CLUB: The makers of Chilidog bring you their latest installment of high class/low rent joy via italo disco, electronic funk, bionic boogie with Vienetta. Which goes down (in more ways than one) in the Lower Haight. And, yes, it's named after the noted Bryer's ice cream cake. (We implore you to watch Vienetta's commercial/parody for maximum enjoyment.)

9 p.m. - 2 a.m. // Underground SF (424 Haight) // free

THEATER: Audience by Vaclav Havel, according to Laughing Squid, is about a playwright and intellectual who is "now only able to find work in a brewery because of his involvement with political dissidents." What's more, the staging takes place at Cafe Royle, so you can fatten your liver while you fattening your brain. Presented by Atmos Theatre's San Francisco Theatre Pub.

8 p.m. // Cafe Royale (800 Post) // $10 (suggested donation)