 I am referring, specifically, to "Skyscraper," which I saw -- saw the first act of, to be completely accurate -- at the Lunt-Fontanne Theatre last night, in homage to a worthy charity, the George Junior Republic, of which I am a patron.The street outside the theatre was jammed with Rolls-Royces and Cadillacs, the playhouse was crammed with attractive and celebrated and polite people, but even the politest could not work up much enthusiasm for this new musical comedy.It contains Julie Harris, quite inexplicably, since she is not a musical comedy performer, Charles Nelson Reilly, who does everything but set fire to his trousers to get laughs where none are written in the libretto, one marvelous construction company ballet in the first act which should open the show, but doesn't, no music to sing of, and a lot of costumes that imitate last year's Courreges.