Every Friday night, fighters trade blows in a ring in the dimly lit Monster Club in southwest China, competing for a $75 payday as a crowd cheer them on.
This joint in Chengdu is owned by a former Chicago resident who was inspired by the 1999 US film "Fight Club", starring Brad Pitt and Edward Norton as the creators of an underground club of pugilists.
Huoche, a man in his 30s who refuses to give his full name and exact age, founded the club in November 2015.
More than 4,000 fighters have faced off in some 2,000 bouts since then.
The competitors sign up online and Huoche pairs them up according to their level, weight and years of experience.
Wearing silk shorts and grappling gloves, they tussle in a 16-square-metre (172-square-foot) ring in front of some 120 spectators.
The club holds four to five matches on fight night.
MMA garnered attention in China recently after a video went viral showing a mixed martial arts fighter pummelling a tai chi master in seconds.
