Groups I may want to do something with:
Meetup
Golden Gate Social Club (former XY Social Club) ?
Ivy Plus
Young Jews (faq)
Berkeley Hillel
The Commonwealth Club of California (INFORUM)
City Arts & Lectures
Jewish Community Center of San Francisco
CalPerfs
Yerba Buena Center for the Arts
Hostel that runs potluck with travel slide show
Peninsula Jewish Community Center ; Bay Jews