The former Newseum complex in Rosslyn is now Artisphere, a regional cultural center that mixes galleries, concert spaces, a theater, a cafe and more. On Saturday, artistic party people the Pink Line Project and Brightest Young Things join forces for Burst, a party that takes its name from the $10,000 worth of balloons that will be used to decorate the 62,000 square feet of space. (TLC is going to be filming the party for an upcoming reality show about the balloon artists called "Twisted." Seriously.) But beyond the 40-foot balloon phoenix, there's plenty to be excited about: free beer and wine, a live music and comedy show from the Family Hemerlein Variety Show, house music from DJs Ultra Nate and Chris Burns, performance artists, skate art installations and two "makeout theaters." If taking the Circulator to Rosslyn is too difficult, shuttle buses will run between Dupont Circle every 15 minutes.