A gymnasium or gym is a place where people do physical exercises to improve their muscles and bodies. Some gyms have rooms where participants wrestle each other.
Many gay pornography videos, some of which became into Gachimuchi sources, were set in gyms.
Two of these notable videos involved Billy Herrington wrestling with some opponents, and one other video involves Van Darkholme fighting against Mark Wolff in a locker room. Duncan Mills works in a gym.
- Currently, it is disputed on who gets the title of the "Boss of the Gym": Aniki (his strength), Mark Wolff (for creating the title), or Van Darkholme (for using the title on him). Each of the three only need to wrestle and defeat the other two to truly win the title, uncontested.