Near the northern border of downtown Houston, Copa Cabana is a bouncing Latin lounge. In the spirit of its Brazilian namesake, the music is loud, the rhythms are lively, and the booze flows plentifully. A long bar stretches the length of the room, with enough wells to handle the large Friday and Saturday crowds. The sizeable floor opposite the bar accommodates legions of dancers, as a giant projection screen rolls video clips overhead. A VIP spot in front of the DJs offers a perfect view of the action, or patrons can slip upstairs to relax among the secluded tables.