The Folsom Street Fair will always be the nipple-clamped granddaddy of fetish festivals. But for every bona fide leather aficionado who struts over to Folsom each September, you get at least five East Bay gawkers who have no real desire to participate in, say, a friendly game of Jockstrap Twister. That's why locals created Up Your Alley (more popularly known as the Dore Alley Fair), a smaller, more San Francentric celebration of kink. Held on the last Sunday of July, Up Your Alley packs several blocks' worth of fetish booths, porn stars, and bare-ass nakedness into a cramped space between Folsom and Howard streets. (If you believe recent stories in the gay press, police will be cracking down on public sex acts at the fair after getting numerous indecency complaints.) The comparative spaciousness of the Folsom Street Fair lets you get away with being a spectator; Up Your Alley demands participation by sheer proximity. For just a few hours, this is the darkest alley in town.