the castro district is always a good place to check out. specifically though, i'm not too sure. i was looking into the "Powerhouse" bar which has events every night. I think Thursdays is underwear/gear night.
if you're interested in cycling shorts spandex, i'm down to meet up and hang out.
Agree with what SS said re: Thursday’s at powerhouse. I’m gone until the week of 11/05 but would love to join you all Thursday 11/08 there if you’re still in the city. Would be fun with all 3 of us (or more)