There's lots to do here, Max. Blackhawk over in the East Bay has a cool car museum.
A zillion good restaurants....Speed Ring in Millbrae(?) if you like to Kart.
Sony Metreon downtown...movies, restaurants, shops. Ferry (not fairy) Building at the end of embarcadero has a cool Farmers' Market Tues. & Sat. a.m., if you're looking to eat cheap/fresh/mingle with the locals.
Teatro Zinzano for dinner & a show, if you've got someone to impress.
Anything specific you're lookin for hit me @
[email protected] for a quick response.