Marquee Dayclub's Poolside Sundays turn the venue's 22,000 square feet into a proper weekend celebration. The setup takes full advantage of The Cosmopolitan's rooftop space with two pools surrounded by lounge areas, multiple bars mixing specialty cocktails, and resident DJs spinning electronic sets that keep the energy flowing from late morning through the afternoon. The music bounces off the glass cabanas and carries across the water as people move between dancing and cooling off in the pools.

The venue offers different ways to experience the day – those grand cabanas with their infinity-edge dipping pools and dedicated service create private lounges along the perimeter, while the main pool areas draw the crowd looking to be in the center of the action. The food and cocktail service keeps everyone fueled through the long afternoon sessions. It's a 21-and-over scene that blends pool party with club atmosphere, with the Vegas skyline providing the backdrop as the DJ booth commands attention from its position overlooking the pools.