Since it’s opening inside MontBleu Resort Casino & Spa on Memorial Day Weekend, the Onsen Beach & Nightclub has become one of the hottest spots in Tahoe. No shocker then that the best-dressed poolside attire flock to Onsen’s epicenter - a poolside dance floor next to the grotto style waterfall. Add in 1,000 people, $50,000 worth of sound and lighting plus one huge Jacuzzi and you’ve got a recipe for a long night.