On Wednesday, May 4, After Bruno Mars performed at his sold out show at the Roseland Ballroom, he hosted his official “Hooligans in Wondaland” after-party. Presented by SVEDKA Vodka, this soiree was at the popular Chelsea hotspot, 1Oak. Partygoers included Mary-Kate Olsen and Cobra Starships’s Gabe Saporta. The co-owners of 1Oak, Scott Sartiano, Richie Akiva, and Ronnie Madra also attended. After guests were treated to The Chainsmokers’s music behind the turntables, the Grammy Award-winning artist jumped on the mic and gave a shout-out to the packed room. The night was topped off with a celebratory toasting and cake with SVEDKA Vodka specialty cocktails.