Electronic music supergroup, Swedish House Mafia, announces their first-ever North American nightlife residency with Wynn Nightlife at the world-renowned Encore Beach Club and XS Nightclub inside Wynn Las Vegas. Beginning Aug. 20, the trio of Swedish DJs comprised of Sebastian Ingrosso, Steve Angello and Axel "Axwell" Hedfors will bring their award-winning music to the unique nightlife setting for two years.