This cluster of downtown high-rise glass towers is designed for conventions. The Westin Bonaventure Hotel & Suites is a spacious, self-contained mini-city of guestrooms, boutiques, dance clubs, bars, restaurants and meeting rooms. One of 20 restaurants, the L.A. Prime Restaurant offers a 360-degree view of the city from the 35th floor. A floor below, the Bonavista Bar revolves around the dramatic evening vistas of the city. An indoor lake is one hint at what an extensive and classy property this is.