There were signs of a truce between the Vegas casinos and the coastal boutique hotels, but with the W Las Vegas, set within the Mandalay Bay complex, we have decisively entered an era of full collaboration. This tower’s thousand-plus suites range from very large to positively vast, and their white-on-white palette and modernist-inspired minimalism make them among the most stylish in town. In-house nighlife options include the sophisticated Franklin Lounge and the 64th-floor Skyfall Lounge; by day, the poolside is the place to be, and the BATHHOUSE Spa offers intensive restoration. Meanwhile the Mandalay Bay setting means guests have access to a literally dizzying array of restaurants and bars, as well as one-of-a-kind entertainment venues like Michael Jackson ONE by Cirque du Soleil.