Buzz is Sting at Nation. yes it's pretty young, but good... Platinum on Saturdays is OK but a bit townie; or you could try Glow at Zei - haven't been myself but heard OK things about it. If you just want to chill try Dragonfly (1215 connecticut ave nw) or 18th St Lounge opposite(both older, richer, trendy places) on (surprisingly enough) 18th Street nw. Red is another option in Dupont circle which is small but usually fun.