Marquee Nightclub at The Cosmopolitan is the premier location for the Las Vegas nightlife experience. Located inside The Cosmopolitan of Las Vegas on Las Vegas Blvd, Marquee is a 40,000 square-foot venue credited with ushering in the dance music craze to Las Vegas when it opened in 2010. The venue features seven different bars and three rooms—The Main Room, The Boom Box, and The Library—each with a distinct musical experience.