From CNN.COM: 

Computer techs turn to fisticuffs for fun

Fight clubs are chance to be ‘a superhero for a night’

MENLO PARK, California (AP) — They may sport love handles and Ivy League degrees, but every two weeks, some Silicon Valley techies turn into vicious street brawlers in a real-life, underground fight club.

Kicking, punching and swinging every household object imaginable — from frying pans and tennis rackets to pillowcases stuffed with soda cans — they beat each other mercilessly in a garage in this bedroom community south of San Francisco.

Then, bloodied and bruised, they limp back to their desks in the morning.

(more here)