Located on the twelfth floor in the East Wing, the Platinum Ballroom was originally known as the Assembly Room and once held a stage that was located on the North end of the room. Lectures, magic shows, conventions, and plays graced the stage, until 1961, when the stage was removed to make the room more spacious for larger banquets. The arched ceiling features original architectural details and the name reflects the silvery damask paper lining the walls.