The landmark Seagram Building houses one of America's most famous restaurants, designed by architect Philip Johnson in a timeless moderne style. The stark Grill Room, birthplace of the power lunch, has inviting leather banquettes, a floating sculpture, and one of the best bars in New York. Illuminated trees and a gurgling Carrara marble pool distinguish the more romantic Pool Room. The eclectic menu changes seasonally; the pretheater prix-fixe dinner is relatively inexpensive. Otherwise, the menu is among the priciest in town. You can't go wrong with Dover sole, steak tartare, truffled bison, or crispy duck, which features a tableside final preparation. Reservations essential. Jacket required. Subway: E, F, 6 to 51st St.-Lexington Ave.