124 Ellis Street

Tel: 415-421-8700

What: Vegas-style lounge, restaurant, and nightclub below the Hotel Fusion, a few blocks from Union Square.
The look: Hong Kong action-flick set—all hard edges except for the Buddha bellies, plus a few Goodwill-inspired couches for table service.
Who goes: A United Nations of club hoppers, a refreshing change from the city's usual crowd of e-geeks and hipsters.
Sound track: Hip-hop and house. On Fridays and Saturdays, two DJs spin in competing lounges.
What to wear: Helmut Lang shirts for guys; low-cut and high-hemmed for women.
What to drink: Vodka and Red Bull—this isn't an artisanal-cocktail crowd, and drinks come in plastic cups.
Door policy: Tougher for guys, and impossible if you're wearing sneakers. Expect a line on weekends.