The Oakland Convention Center/Marriott Oakland City Center complex is one of the first structures in California to house both a convention center and hotel. An atrium lobby joins the two-story convention center with the 483-room hotel. Convention center meeting facilities can accommodate 6,000 people and banquet facilities seat 3,900 diners. There is a 48,000-square-foot exhibition hall that can be divided into smaller halls, 12 additional meeting rooms, and a parking garage. Approximately 7,500 square feet of additional meeting space is available on the center's second level, with 8,000 square feet inside the hotel. The Marriott offers an additional 25,000 square feet of flexible function space.
The Henry J. Kaiser Convention Center is a multifunction facility consisting of the Kaiser Arena, Calvin Simmons Theatre and two banquet/ballrooms. Kaiser Arena can accommodate up to 8,000 patrons for a variety of events and has a banquet capacity of 1,500 people. The arena's 23,000-square-foot hardwood floor accommodates up to 150 eight-foot by ten-foot trade show booths. The 1,900-seat Calvin Simmons Theatre has been restored to European splendor with a gilt-trimmed proscenium stage. The center's ballroom and goldroom host many functions of all types.
Other large facilities include the Network Associates Coliseum and Arena Complex, which features an outdoor stadium for baseball and an indoor arena; the state-of-the-art County of Alameda Conference Center; and the California Ballroom.