Many of New York City's buildings in the 1930s had restaurants or exclusive clubhouses on the top floors of their buildings. This stemmed from a tradition that started in the late 19th century, after the introduction of elevators. The specific idea for a restaurant atop the RCA Building may have been inspired by the Cloud Club, a lunch club in the Chrysler Building. On the 65th story of the RCA Building, the builders constructed a two-story space intended for a dining room with a high ceiling. The plans called for two restaurants on the 65th Floor. The Rainbow Grill, a small casual-style eatery, would occupy the western portion of the floor, while a larger restaurant for dancing and entertainment, comprising the future Rainbow Room, would be located in a larger space on the eastern part of the floor. There would also be private dining compartments on the floor below. The Rockefeller Center Luncheon Club, composed mostly of Rockefeller Center tenants, would eat lunch at the Rainbow Room from 11 a.m. to 3 p.m. each day. More established restaurateurs believed that the juxtaposition of the two eateries was an unwise business decision, but Rockefeller ignored them.