In the old Las Vegas, casinos were generally unimaginative box-shaped rooms that could pass as warehouses, and gamblers were satisfied with a bucket of quarters and three-reel slots. But today’s customers are more sophisticated, have greater demands and higher expectations — including gambling in a party environment. Free drinks are passé; these gamblers are on the hunt for an entire nightclub experience alongside the casino table. And Las Vegas, of course, aims to please.