Looking to get your geek on? Check out these recurring geeky events in San Francisco:
BayAreaScience.org - weekly newsletter of science events around the Bay
Down to a Science
How-To Nights @ Bazaar Cafe
Nightlife @ Cal Academy
Afer Dark @ The ExplOratorium
After Hours @ The Tech Museum
INFORUM
ThinkWalks: Nerdy SF tours
Geeks vs Geeks Trivia @ Fly Bar