The Majestic Theatre went dark, the Phantom retreated into myth, and New York’s longest-running romance seemed consigned to history. That’s Masquerade, the new off-Broadway sensation staged inside the cavernous shell of Lee’s Art Shop on 57th Street. If Sleep No More met The Music of the Night, the offspring would look a lot like this. The Cast Behind the MasksWith six Phantoms and six Christines rotating throughout the evening, Masquerade ensures that no two performances are alike. It’s like being lost inside the world’s sexiest Whole Foods, only instead of avocados you find chandeliers and aria-singing lovers at every turn.