DORK SEX: Reach deep into your bag of holding, pull out your cleanest shirt with the cleverest open source one-liner on it, and head over to Polyamory Speed Dating. Really, this has disgusting written all over it. Enjoy. (And this is in Berkeley. Oh, don't act surprised.)

6:30 - 10:15 p.m. // Spud's Pizza & Beer (3290 Adeline) // $12-20

MUSIC: It's the best in late '90s/early '00s indie rock. Not to be missed are Built to Spill, Quasi, and Off Campus performing in SoMa tonight. (Added bonus: SFist Leanne will be working the room. Be sure to buy her a drink or three!)

9 p.m. // Slim's (333 11th Street) // $8

MUSIC II: "Standing with your arms crossed while nodding your head to guitar-based progressive post-rock probably won't do too much damage," brilliantly quips SFBG's Laura Mojonnier. And we couldn't agree more. So get your introspection on by catching sublime Mogwai's thick, electronic, guitar-heavy sounds. Fuck Buttons opens.

8 p.m. // Grand Ballroom, Regency Center (1290 Sutter) // $22.50