Hotel trends sweep over New York City in waves. The last sea change began in the 1980s, when Studio 54 impresario Ian Schrager pioneered the concept of the boutique hotel and “lobby socializing,” making the sleek bar with a 20-foot fireplace at his Royalton the hottest spot in town, as fashionable New Yorkers jockeyed to get past the velvet rope. Simply put, Schrager turned hotels into scenes.