Marquee Dayclub turns its pool deck into Halloween weekend headquarters with Martin Garrix behind the decks, delivering the kind of big-room electronic sound that's made him a fixture on the world's biggest festival stages. The Cosmopolitan's multilevel playground comes alive under the desert sun, with two pools, infinity-edge cabana dips, and a crowd dressed to impress (or dressed up for the occasion) soaking in the energy.

Expect the usual dayclub sensory mix: bass thumping across the water, mist cooling the air between sets, and the clink of cocktails from the bars scattered throughout the space. Grand cabanas offer a private vantage point with dedicated food and drink service, while the open pool areas keep the party loose and communal. With Halloween weekend energy layered on top of Garrix's signature sound, this one leans into spectacle without losing the laid-back, sun-soaked vibe that Marquee's known for.