You may not be into leather or the BDSM scene, but if you live in San Francisco you've probably breezed through Folsom Street Fair once or twice. Call it what you will, but it is the largest event of its kind in the world, and the third largest single-day outdoor event in California -- behind SF Gay Pride and maybe Long Beach Pride? (We think these numbers are hard to nail down, but suffice it to say the gays like to party outdoors.)
