Last week, a group of advocates filed an urgent Request for Evaluation with the Landmarks Preservation Commission for the Ambassador Grill & Lounge and Hotel Lobby at the United Nations Plaza Hotel . These interiors, designed by Kevin Roche John Dinkeloo and Associates , and completed in 1975 and 1983, respectively, are spectacular luxurious rooms, which use mirror, pattern, and lighting to trick the eye into seeing palatial space, daylight, and high ceilings where there are actually none.