Lumpini Stadium in Bangkok is the Madison Square Garden of Muay Thai (Thailand's ferocious brand of kickboxing). On a big fight night, the front entrance to the rickety old structure is a beehive ...

Well that depends on the individual. My guess would be money and time. The cost of joining a Muay Thai gym in the U.S. for example can average from $120 to $200 per month depending on where you live.