Well, what can I tell you? I'll probably head to the Presidio for the craigslist party ...
It's not like there's any shortage of things to do ... for example, the San Francisco Museum of Modern Art offers half-price admission from 6 p.m.-9 p.m. Thursday evenings, and it's a short walk from the Montgomery or Powell St. BART stations. Check out the 010101: Art in Technological Times
exhibit on the fourth floor. Decent food options in the area include Max's Diner at 3rd and Folsom and Cha Am (Thai) on Folsom just west of 3rd. Also of note: ThirstyBear Brewing Company on Howard, just east of 3rd.