36.
Dance club in the Castro
Here's a dance club in the Castro. Quite young, but good for when you want to get up and dance and dont want to trek to the south of market clubs.
Trendy youngish bar
I was visiting in SF after many years away and was disappointed at the change in this bar. I loved the former incarnation of this place. Anyway, it is still very popular, but it doesn't have the same feeling as before. Time goes on, I guess. :)
The Pilsner Inn is the best
This is a wonderful neighborhood bar. Friendly and mixed group. Mostly gay men, but lots of Lesbians and straight folks, too. All are welcome. Highly recommend!