Sergei Rachmaninoff was a prominent Russian composer, pianist, and conductor who immigrated to the States in the late 1910s. He lived at the Garden of Allah in the late 1920s and was Harpo Marx’s downstairs neighbor. They did not, however, get on very well so when Rachmaninoff made too much noise, Harpo retaliated by playing the first 64 bars of Rachmaninoff’s Piano Concerto #1 as loud as he could until it drove the composer from the Garden. It wasn’t until Rachmaninoff had moved out that Marx was told who he was!