You know a show is a big deal when the two headliners get separate afterparties. After the Justice/Diplo show at the Riviera tonight the Frenchies are heading to Sonotheque to spin with my guys the Gutter Butter DJs and Young Wes is off to Debonair for his own event. Odds are that the Justice party--a fund-raiser for the Iraqi metal band Acrassicauda--is going to be jam-packed insanity, and the Diplo party is going to be full of people who either don't feel like dealing with Justice-related claustrophobia or have figured out that their DJ skills are kinda weak.
I'd suggest skipping the big names and hitting up Empire Liquors, where Baltimore/D.C. party destroyer Dave Nada is headlining a solid night of less well-known DJs. Given Mr. Nada's touch with the bootytastic club jams--specifically on some Baltimore house--it should be at least as good as the more hype-heavy parties, and as a bonus it'll be way easier to breathe at.