Vanguard - House music fanatics, hip-hop crews, Hollywood flakes and tourists alike throng by the hundreds, even thousands, to this massive, multi-level dancehall each week to see top-name house DJs, special concerts and fashion parties. The dance floor is huge, the sound system is crisp and banging, and the extended bar flanking the right side keeps the crowd in close contact with the overpriced Hollywood cocktails. Slip past the smoke and lasers to try and juice your way into the upper-level VIP. Or mingle with the singles crowd on the balcony, or in the large patio decked out with recliners, curtained couches, and a big smiling Buddha. In a city where most clubs shut their doors by 2 A.M., the Vanguard’s dedicated after-hours dance scene has become a mainstay for house music and late-nightlifers in L.A.