Off the Halsey Stop in Bushwick is a warehouse party where sequin-clad women pass out smoky mezcal shots in a room decorated with neon, glitter and flowers bigger than your head. A live band lays down a mischievous mood and strangers come together over tacos before breaking it down on the dancefloor with a ghost. It’s “Quince,” the latest production playing at the Bushwick Starr’s new location on Eldert Street.