This Saturday, Yerba Buena Center for the Arts will hold its final free "What's the Big Idea?" late night party of the season, ending on the theme "Ritual & Redemption." The party starts at 9 pm, and while they're no longer accepting RSVPs for preferred admission, everyone is welcome to show up and wait in line. With the Mission Street Food truck (yes, they're back in a truck!) arriving outside the museum on 3rd Street at 7:30 p.m., you have incentive to get there early. The lineup includes music from local bands Pansy Division and Ex-Boyfriends, "Project Nunway" from the Sisters of Perpetual Indulgence, and free tattoos from local tattoo artists. If you really love YBCA, getting a YBCA logo tattoo and filling out some paperwork will get you a free lifetime membership. Cheap cash bar too, of course.

Attendees will also have access to the three current YBCA exhibitions—Nick Cave: Meet Me At the Center of the Earth (dancer and artist Nick Cave, not the Bad Seeds frontman); Under A Full Moon: 30 Years of Perpetual Indulgence, including art, photos, and artifacts from San Francisco's outragous drag nuns; and Through Future Eyes: The Endurance of Humanity, a collection of 11 pieces by artists like Shepard Fairey and Melissa Day, curated by six teens from YBCA's Young Artists at Work program.

If all of this isn't enticing enough, check out YBCA's promo video for the party: