An evening up on the Empire State roof-the strangest experience. The huge tomb in steel and glass, the ride to the 84th floor and there, under the clouds, a Hawaiian string quartet, lounge, concessions and, a thousand feet below, New York-a garden of golden lights winking on and off, automobiles, trucks winding in and out, and not a sound. All as silent as a dead city-and it looks adagio down there.