bah, idiots .... i love MY DC
Go to Georgetown, its a lot of fun. Bars, shopping, restaraunts, etc + dont miss the harbor front there.
Adams Morgan has a lot of good bars
Clubs I'd reccomend: Insomnia (in China Twon), Nation (near Navy Yard, but I think they shut it down, not sure), Relish, DC Spot, Cage, Diva ... lots others
Arlington Nat'l Cemetary is often overlooked, and its really worth a visit
Tysons Corner Malls, HUGE!
The Smithsonian Mall, of course (make sure u pack ur own food tho. Those hot dogs & crap are awful + overpriced)
Just stay away from South-East DC at late night
and if u're using the Metro, its closes at midnight on weekdays and 2:00am on weekends, IIRC