Gleason's is a boxing gym located on the Brooklyn waterfront. Since 1937, when the gym was founded in the Bronx, boxers with their eyes on Olympic glory or a shot at the title have been training at Gleason's. Fighters who trained at the gym include Jake LaMotta, Roberto Durán, Benny "Kid" Paret, Paulie Malignaggi, Gerry Cooney, and Mike Tyson. Before his first title fight against Sonny Liston, Muhammad Ali, then known as Cassius Clay, also trained at Gleason's.
Gleason's is reminiscent of the time when New York was the center of the boxing universe, when there were dozens of serious gyms in the city and when big fights were often held in Madison Square Garden. Now Gleason's is among the last of a breed. It manages to stay open by permitting average joes—men and women—to train side by side with professional boxers, and stages "white-collar boxing" events that cater to this clientele.
There is also a wrestling school called the World of Unpredictable Wrestling run by WWE Hall of Fame member Johnny Rodz. Many wrestlers and wrestling promoters have come from there. Graduates include Tommy Dreamer, Matt Striker, Taz, D-Von Dudley, Vince Russo, Prince Nana, Kodama, Obariyon, as well as Big Vito, Da Baldies, Elektra, Ricky Vega, The Musketeer, Mac Daddy Flexx, Tim Arson, Damien Demento, the late S.D. Jones, the late Rocco Rock, and many more.
There is a sign on the wall at Gleason's, posting an invitation from the poet Virgil: "Now, whoever has courage, and a strong and collected spirit in his breast, let him come forward, lace on the gloves and put up his hands." (Aeneid 5.363-364) Prizefighters have long answered this call at Gleason's and some still do. 
Owner Bruce Silverglade and Gleason's elite trainer Hector Roca co-authored the book The Gleason's Gym: total body boxing workout for women, with a foreword by actor Hilary Swank (she famously thanked Hector Roca when she received her Oscar for her role in the boxing movie "Million Dollar Baby"). There is a book called: White Coller Boxing: One Man's Journey From the Office to the Ring, in which John E. Oden describes Gleason's Gym in Chapter 6.
In 2015, part of episode 18, season 4, of the television comedy show "Impractical Jokers" took place at the gym.
- "The Gentleman Boxer". Village Voice. 2008-11-25.
- "Dan Ackman, "And in this Corner the Insurance Broker"". Wall Street Journal, Aug. 21, 2002 (retrieved from author's website).
- "At Gleason's Gym", Ted Lewin. 2007. ISBN 978-1-59643-231-4, ISBN 1-59643-231-4. Published by: Roring Book Press, New Mildford, Connecticut. United States.
- Hector Roca & Bruce Silverglade, The Gleason's Gym: total body boxing workout for women. 2006. ISBN 978-0-7432-8687-9. Published by: Fireside (Simon & Schuster, Inc.), New York, NY.
- John E. Oden, White Coller Boxing: One Man's Journey From the Office to the Ring. 2005. ISBN 1-57826-207-0. Published by: Hatherleigh Press, Long Island City, New York. United States.