MUSIC: Celebrate the legendary Gram Parsons while benefiting The Hickory Wind Ranch, a sober living environment in Austin, TX started by Gram's daughter, at the 10th Annual Sleepless Nights, an annual celebration of Parsons' music and his influence on generations of country/rock musicians. The line-up includes Red Meat, Chuck Prophet & Stephanie Finch, Sweet Chariot, East Bay Grease, Big Eagle, Gypsy Moonlight Band, and Paula Frazer. (8 p.m., The Great American Music Hall, 859 O'Farrell Street)

FILM/PERFORMANCE: Hurry up and get your tickets to Peaches Christ's sure-to-sell-out presentation of "the greatest film ever made", Showgirls. Get a free lap-dance with every popcorn by Peaches’ legion of live “dude-girls”. The event also features a "Volcanic Goddess" pre-show with the purchase of a VIP ticket, plus much more. (6:30 p.m., Castro Theatre, 429 Castro Street)

ART: Arc Studios presents The 2nd Annual "FourSquared" exhibition, featuring sixteen pieces of work by sixteen local, Bay Area artists, showcased in sixteen clusters, "giving the audience the experience of sixteen micro solo exhibitions." (7 to 10 p.m., Arc Studios, 1246 Folsom Street)