This Wired News Fightclub article seems oddly behind the times:
A couple times a month, deep in Silicon Valley, a group of software engineers meets for a Gentlemen’s Fight Club. Scroll through the pictures to see and read the story of the most recent gathering.
Most of the fights are simple sparring matches, often with training weapons — fake knives or rolled-up magazines, etc. Nonetheless, people get cut and bruised, so there’s some bright red blood for the photographer to record.