Unless you're a regular on the society page, it may be a tad difficult to get into the exclusive 18th Street Lounge ... they don't let in just anyone. So put on your most stylish togs, look smart and be ready to work your way past the velvet rope. Once in, you'll find a room full of Washington's elite – from domestic and international politicos to the occasional celeb – sipping cocktails, filling the dance floor and rubbing the elbows of their designer threads. Live shows, DJs and theme nights highlight the weekly calendar. METRO: Farragut North or Dupont Circle