Assuming Gustav doesn't stop by and spoil the weekend, there's a party not to be missed in Key West -- especially if you're a Gen Xer and/or a book lover. For those of us who are both -- you can't ask for much more. Voltaire Books, our wonderful independent bookstore, is throwing a bash called '80s Extended, featuring D.J. Voltaire, aka Voltaire owner Christopher Kush. Word has it he's unearthed all his vinyl for this event, which will be Upstairs at Mangoes, 700 Duval St., on Sunday, Aug. 31 (it's Labor Day weekend, remember, so you can sleep in on Monday). Munchies are from 8 to 9 p.m., with dancing from 9 til 2 a.m. Tickets are $10 at the door or $8 at Voltaire Books, 330 Simonton St. The flyer promises a whole bunch of good stuff, best summed up as: Classic 12" Re-Mixes, Rarities and Guilty Pleasures. But my favorite part might be the small-type notice, which says that while this is a benefit for an excellent cause (Friends of the Key West Library), "this is really just an excuse to dance your ass off." Mea Copa, man.