On Saturday night, David Bowie perched against a banquette at the Top of the Standard, deep in conversation with Diana Ross. Nearby, George Michael jumped atop the circular bar, shredding his acoustic guitar, while Kirsten Dunst broke out in her cheerleader routine from Bring It On. Welcome to Halloween in New York City. This weekend, the social set got truly creative, channeling their favorite characters—fictional and otherwise—as they celebrated all things haunted. At The Blond, photographer Ellen von Unwerth held a spooky soiree, circling the room dressed as a pink-haired Marie Antoinette figure, as a crystal-encrusted dancer performed a slowed-down strip tease. Over at the Top of the Standard, revelers grooved to a live performance by En Vogue—the perfect soundtrack to a room filled with plenty nostalgia-fueled costumes. Here, go inside the most exclusive and rambunctious events of the night.