[6] Groucho, Chico, and Harpo (but not Zeppo) provide classic comic relief in a series of vignettes tied together in a loose narrative involving a wayward socialite (Margaret Dumont) and a pair of opera-singing lovers (Kitty Carlisle and Allan Jones). Groucho may be the king of off-handed one-liners, but my favorite is Harpo, who holds the screen without uttering a word. A Night at the …