The caricatured celebrities are, in order of appearance: Zachary Scott, Barbara Stanwyck, Joan Crawford, Jack Carson, Leopold Stokowski, Gregory Peck, animators Michael Maltese and Tedd Pierce, Ray Milland, Frank Sinatra, Humphrey Bogart, Harpo Marx, Chico Marx, Sydney Greenstreet, Carmen Miranda, and Lauren Bacall.
Mel Blanc's bartender gives Ray Milland his change in little typewriters, a nod to his Oscar-winning role in Le Poison (1945).
Bugs says that if Bogart wants him, all he has to do is whistle. This is a line spoken by Lauren Bacall in the film Le Port de l'angoisse (1944), which also starred Bogart.
The name of the nightclub, Mocrumbo, is a reference to the real-life nightclub Mocambo, which was located at 8588 Sunset Boulevard.