← byPeach·Gyms · Combat sports·Round Twelve
ROUND XIIEst. MMVIII · Brooklyn NY3-class trial · $30 →
BROOKLYN  ·  BOXING  ·  MUAY THAI  ·  BRAZILIAN JIU-JITSU
The floor is open · 14 on the mat

GO THE
DISTANCE.

A working fighter's gym since 2008. Sparring four nights a week. No mirrors, no contracts, no Instagram coaches. Bring a mouthguard the first time and we'll find you a partner.

12
// coaches behind the cards
07
// pro fighters on roster
600+
// members through the door
Mon – Sat  ·  06:00 – 22:30  ·  Sun 09:00 – 14:00↳ 412 Atlantic Avenue · Boerum Hill · Brooklyn NY 11217EST. MMVIII  ·  ROUND 17 · BELL RUNG
// Round I · The Disciplines

THREE ROOMS.
ONE GYM.

The three disciplines we have always taught, and the only three we ever will. Cross-train them however you like - one membership opens every door in the building.

01 / BOXING ROOM
Boxing - heavy bags and ringi. THE RING · 16ft · canvas

BOXING.

// FOUNDED 2008 · 14 CLASSES / WK

The room we opened with. A 16-foot ring, eight heavy bags, two double-ends, and an honest sparring rotation every Tuesday and Thursday night. Beginner’s class doesn’t touch a partner for six weeks - learn the shape first.

Lead coach
RAY GUZMAN
Open mat
THU · 19:30
Members
312
Sparring
4× / WK
FROM FUNDAMENTALS TO PROSee the rota →
02 / MUAY THAI ROOM
Muay Thai - Thai bags and clinchii. THE BAGS · 6 banana · clinch corner

MUAY THAI.

// SINCE 2012 · 11 CLASSES / WK

Six banana bags hanging from a single I-beam, two clinch corners, and Kru Anan - flew over from Bangkok in 2012 and never left. We hold a smoker every quarter. Kru picks the matches.

Lead coach
KRU ANAN
Open mat
WED · 20:00
Members
187
Smokers
4× / YR
CLINCH · KICKS · ELBOWSSee the rota →
03 / THE MAT
BJJ - gi and no-gi matiii. THE MAT · 1,800 sqft · gi & no-gi

BJ

// SINCE 2015 · 13 CLASSES / WK

1,800 square feet of mat. Gi and no-gi, fundamentals through advanced. Professor Marcelo Vieira is a Carlson Gracie black belt - our blue belts pass at IBJJF on average. Bring a pair of clean toes.

Lead coach
PROF. VIEIRA
Open mat
SAT · 13:00
Members
241
Black belts
3
GI · NO-GI · TAKEDOWNSSee the rota →
// ON THE FLOOR NOW
BOXING · FUNDAMENTALSRING · COACH RAE · 12 IN
MUAY THAI · CLINCHBAGS · KRU ANAN · 7 IN
OPEN · BAG WORKFREE FLOOR · 4 IN
UPDATED JUST NOW
NEXT CLASS · BJJ 18:30
// Round II · The Coaches

TWELVE NAMES.
ONE CORNER.

Every coach behind a Round Twelve card has fought one of their own. Seven hold active pro licences. The other five hold the towels and we wouldn't run the place without them. Hover for a record - W–L–D, amateur or pro.

// 01 · HEAD COACHPRO
Ray Guzman, head coachRGORTHODOX

RAY GUZMAN

BOXING · 17 YRS COACHING
RECORD22 – 4 – 1 PRO
// 02 · MUAY THAIPRO
Kru Anan SuwanASSOUTHPAW

KRU ANAN

MUAY THAI · LUMPINEE '04
RECORD54 – 11 – 0 PRO
// 03 · BJJ HEADBLACK BELT
Marcelo VieiraMVGUARD

M. VIEIRA

BJJ · CARLSON GRACIE LINEAGE
IBJJF4× BLACK MEDAL
// 04 · BOXINGPRO
Daniella ReyesDRORTHODOX

D. REYES

BOXING · 122 LB · ACTIVE
RECORD11 – 1 – 0 PRO
// 05 · MUAY THAIPRO
Issa KoneIKSOUTHPAW

ISSA KONE

MUAY THAI · 147 LB · ACTIVE
RECORD18 – 5 – 1 PRO
// 06 · BJJBROWN BELT
Sasha PetrenkoSPPASSER

S. PETRENKO

BJJ · NO-GI SPECIALIST
ADCC TRIALSFINALIST '24
// 07 · BOXINGAMATEUR
Tyrell OwensTOORTHODOX

T. OWENS

BOXING · GOLDEN GLOVES '22
RECORD14 – 2 – 0 AM
// 08 · STRENGTHS&C
Maeve O'BrienMOCSCS

M. O'BRIEN

S&C · 9 YRS · CSCS · USAW
PROGRAMMEFIGHT CAMP

PLUS FOUR APPRENTICES, A CUT-MAN, AND ONE RING DOCTOR.

Roster as of MMXXVI · trial sessions are coached by a head, never an apprentice.
// Round III · The Week

FORTY-ONE
CLASSES / WK.

From the six a.m. fundamentals slot to the ten p.m. open mat. Filter by discipline to thin the noise. Capacity is live - we cap every class at the number we can coach properly, never one more.

Week of  Mar 17 – 23, MMXXVI
// TIME
MON17
TUE18
WED19
THU20
FRI21
SAT22
SUN23
06:00
BOX FNDRAY G. 8 / 16
BJJ NO-GIM. VIEIRA 14 / 18
BOX FNDD. REYES 9 / 16
MT FNDKRU ANAN 12 / 14
BOX FNDT. OWENS 7 / 16
S&CM. O'BRIEN 6 / 12
12:15
BJJ GIM. VIEIRA 6 / 16
BOX TECHRAY G. 13 / 16
MT BAGI. KONE 8 / 14
BJJ NO-GIS. PETRENKO 11 / 18
BOX TECHD. REYES 16 / 16
OPEN MATALL BELTS 22 / 40
OPEN BAGUNCOACHED 9 / 20
18:00
BOX INTRAY G. 14 / 16
SPAR · BOXRAY G. + RG 12 / 12
MT CLINCHKRU ANAN 9 / 14
SPAR · BOXD. REYES 11 / 12
BJJ GIM. VIEIRA 10 / 18
MT INTI. KONE 8 / 14
19:30
BJJ INTS. PETRENKO 12 / 18
MT BAGKRU ANAN 11 / 14
BJJ NO-GIM. VIEIRA 16 / 18
BOX OPEN MATRAY G. 14 / 24
SPAR · MTKRU ANAN 14 / 14
21:00
S&CM. O'BRIEN 4 / 12
BJJ ADVM. VIEIRA 7 / 14
BOX ADVRAY G. 9 / 14
MT ADVI. KONE 6 / 14
S&CM. O'BRIEN 5 / 12
BOXINGMUAY THAIBJJS&CFUNDAMENTALS · INTERMEDIATE · ADVANCED · SPARRING · OPEN MAT
// Round IV · Fight Night XVII

THE BELL
RINGS AT 8.

Twice a year we close the gym, set up the ring properly, and put our fighters against the rooms we share a city with. Doors open at seven. Six bouts, three rounds, no music between rounds - you'll hear corners.

· PRESENTS ·
FIGHT
NIGHT
XVII · BROOKLYN
// DATE
SAT 04.18
// DOORS
19:00
// BELL
20:00
ROUND TWELVE GYM · 412 ATLANTIC AVE
BROOKLYN, NY 11217

RESERVED SEATS · $45 · STANDING · $25
MEMBERS & CORNER GUESTS · COMP
THE CARD
6 BOUTS · 3 ROUNDS
VI
D. REYES
11 – 1 – 0 PRO · ROUND XII
VS
A. NOVAK
9 – 2 – 1 PRO · MENDEZ NYC
MAIN
122 LB BOX
V
I. KONE
18 – 5 – 1 PRO · ROUND XII
VS
P. ARANDA
14 – 6 – 0 PRO · TIGER MUAY
CO-MAIN
147 LB MT
IV
T. OWENS
14 – 2 AM · ROUND XII
VS
L. BENNETT
11 – 4 AM · GLEASON'S
160 LB BOX
III
Z. HALL
6 – 1 AM · ROUND XII
VS
R. OKAFOR
7 – 2 AM · CHURCH ST
135 LB MT
II
J. PARK
3 – 1 AM · ROUND XII
VS
F. DURÁN
4 – 1 AM · BUSHWICK BOX
130 LB BOX
I
N. OSEI
DEBUT · ROUND XII
VS
D. HAYES
1 – 0 AM · OVERTHROW
OPENER
147 LB BOX
// Round V · The Room

412 ATLANTIC AVE.

Eight thousand square feet on the corner of Atlantic and Bond. Ring, banana bags, mat, plates, cold showers, two beat-up couches, and the dog. We've changed the canvas three times since 2008. Same dog.

The ring, after a Tuesday spar
i. THE RING · AFTER TUESDAY SPAR
The bag room
ii. THE BAG ROOM · 06:14 AM
The mat - open mat Saturday
iii. THE MAT · SAT OPEN
The corner - fight night XV
iv. THE CORNER · FN XV
// Round VI · Join

ONE MEMBERSHIP.
THREE ROOMS.

No annual contracts, no enrolment fees, no day-pass scams. Pay by the month or save by paying for a year. Founders - thirty of you - locked their rate in 2008 and keep it forever.

DROP-IN

// VISITING FIGHTERS · GUESTS
$30/ CLASS
  • One class · any discipline
  • Rental gloves & wraps included
  • Cold shower & lockers
  • Open mat & sparring nights
  • Gym key for 24/7 access
  • Fight Night comp seats
BOOK A DROP-IN →

ANNUAL

// THE COMMITTED · SAVES $470
$1,798/ YR · PAID UP
  • Everything in Monthly
  • Gym key · 24/7 floor access
  • Four private sessions / year
  • Free corner work at fight nights
  • Four Fight Night comp seats / yr
  • Name on the wall · permanent
GO ANNUAL →
// Three-class trial · $30

WALK IN.
WE'LL TAKE IT FROM THERE.

Thirty dollars, three classes, any discipline, anytime in the next two weeks. We'll text you the night before, hand you wraps at the door, and put you with a coach we'd hand our own kid to.

  • Bring · MOUTHGUARD, WATER, A TOWEL
  • We lend · WRAPS, GLOVES, SHIN PADS
  • Wear · ANYTHING YOU CAN SWEAT IN
  • No prior experience required · GENUINELY

We text the night before your first class.
No cards stored. No auto-renew. No spam, ever.

// THE HOUSE CODE

RESPECT
THE ROOM.

We don't post it on the wall because everyone signs it on the way in. Eight lines. Break one and Ray will have a quiet word. Break two and we'll have a louder one.

  1. I

    SHAKE HANDS.

    Before and after every round. Every partner, every belt.

  2. II

    CONTROL.

    Sparring is practice, not a fight. We pick speed and pressure together.

  3. III

    TAP EARLY.

    Pride heals slower than a torn ligament. Tap, learn, go again.

  4. IV

    CLEAN GEAR.

    Wash your gi, dry your wraps, trim your nails. Both sets.

  5. V

    NO PHONES.

    Pictures with a coach's nod. Filming sparring needs everyone's.

  6. VI

    BELT THE LINEAGE.

    Promotions belong to the school you earned them in. Tell us yours.

  7. VII

    LEAVE IT HERE.

    What happens on the floor doesn't follow you out the door.

  8. VIII

    SWEEP UP.

    Last one off the mat gets the broom. We've all done it. Ray still does.