Taking its name from the L.A. Stock Exchange, which was headquartered here in the '20s, this mega-club is all flash. Everything is over the top, from the sensory-assaulting sound and light systems to the constant crowds. DJs pump house, Top 40 and rock en Espanol over two sweaty dance floors. As with its namesake, the Stock Exchange offers no guarantees, but dolled-up ladies outnumber Armani-wearing macho men almost three-to-one.