Nightlife can be hazardous to your clothes -- a busy evening’s sweat, spills, and errant cigarettes will turn sequins into rags by dawn. Our advice: Save the Gucci and Marc Jacobs for cocktail parties, and pick up your sexy, stretchy, just-this-side-of-slutty club gear at Joyce Leslie. You can find dirt-cheap designer knockoffs here -- everything from faux-Helmut to mock Miu Miu -- before the originals even hit the stores. This season, look for the greatest hits of the eighties: bright, zipper-festooned pleather jackets (from $9.99), asymmetrical half-shirts, and a one-shouldered, camouflage-print mini-dress, for starters. Sure, they’ll be passé by fall -- but you’ll have trashed them by then anyway.