For its Pre-Folsom Party, Bootie brings together seven different DJs and bands -- hailing from San Francisco, Los Angeles, and Seattle -- for a Folsom Street Fair pre-party, with plenty of sexy mashups and fetish-tinged fun to go around.

At 11 PM, Bootie's live mashup rock band Smash-Up Derby takes the stage for a sexed-up, fetish/leather-themed set, featuring guest singers Shyboy from LA rock band Hypnogaja, and Isla from LA indie-electro duo Purple Crush, who will also be performing the Midnight Mashup Show.

Joining A+D on the decks will be a trio of Bootie's favorite DJs, spinning both on the main floor and in the upstairs room -- DJ Shyboy (Bootie LA), DJ Freddy, King of Pants (Bootie Seattle), and DJ Rawburt (Blender, West Hollywood).

Launched in 2003 in San Francisco by A Plus D -- aka DJs Adrian & Mysterious D -- Bootie was the first club night dedicated solely to the burgeoning artform of the bootleg mashup -- and is now the biggest mashup event in the world, with regular parties in several cities on four continents. Voted "Best Club Night" for the past six years, Bootie keeps your brain guessing and body dancing with creative song combinations, mixing and matching every musical genre, era, and style into one big dance party. Providing the soundtrack for the A.D.D. generation -- and free mashup CDs given away like candy -- it's a place where everyone is welcome.