Well, I'll try to offer some info for things to do later, but just so you are prepared june 26th/27th are Gay Pride in SF so the city is going to be very very full. Not counting your reaction to overweight topless hairy women and super buff topless and hairless men...
Me? I'm gonna watch the parade from my home and giggle everytime they don't pixelate breasts or penis' (like a 12yr old!)

jr

ps the nudity will only really occur during the parades not during the touristy about town stuff.

"What can be asserted without evidence can also be dismissed without evidence." C Hitchens