CLUB: Local fave DJ Earworm -- whose is recent hit "United State of Pop (Viva La Pop)" received so much national radio play that it charted the Billboard Pop 100 -- headlines a night of unabashed homosexual frolicking at "Cockfight" (not to be confused with the Sapphic "Cockblock" at the Rickshaw Stop). In addition to the tunes and boys, there will be a midnight show with tranny Felicia Fellatio, scantily clad go-go dancing cocktail servers, happy hour from 9 p.m. - 10 p.m., and more.

9 p.m. - 2 a.m. // Underground SF (424 Haight) // free before 10 p.m., $6 after

FILM: Check out Travolta's Saturday Night Fever while enjoying Arinell Pizza, cheesecake, popcorn, and $3 beer & sparkling wine over at a cafe in the Mission. Mmm.

7 p.m. // Coffee Bar (1890 Bryant) // free

SPORTS: Check out a fierce all-women flat-track roller derby bout when San Francisco ShEvil Dead takes on Richmond Wrecking Belles at tonight's "Bay Area Derby Girls Bout 2: Shamrock N Roll."

8 p.m. // Fort Mason Center (Herbst Pavilion, Marina Blvd. and Buchanan) // $15-$17