Rising 50 feet above the pool deck, the Marquee Dayclub Dome at The Cosmopolitan of Las Vegas offers a year-round party atmosphere within a 23,000-square-foot space. Heated by two million BTUs, the Dome creates a balmy environment with 90-degree water perfect for swimming no matter the weather. The venue features two pools, several bars, and a world-class sound system that complements performances by resident DJs, showcasing top electronic and live music talent.