Marina Mandarin Hotel Marina Square, Singapore Guest rooms: 640 Meeting space: 23,600 s.f. (2,200 sm) Part of the Marina Square mixed-use development, this five-star hotel caters to the needs of the international business community. The Marina Mandarin features a dramatic barrel atrium, and draws events from around the world with its 64,750 s.f. (6,015 sm) of exhibition space.