Directed by Norman Z. McLeod
Written by S.J. Perelman and Will B. Johnstone
Chico Plays the Piano
IMDB

The Marx Brothers are stowaways on a ship. They get chased around the ship by the crew while wreaking havoc. Eventually, Groucho enters the room of a gangster-type who hires Groucho and Zeppo to take out a millionaire who is on the boat, who in turn enlists Chico and Harpo as his bodyguards.
It's hard to really say that this movie is about anything. It is more about the Marx Brothers just going crazy and creating anarchy. This movie rivals Duck Soup in terms of humor and insanity. There aren't that many songs in this movie, which is a plus. Chico still plays the piano and Harpo still plays the harp, but it's not too obtrusive. Plus, I love watching Chico play the piano.
If you've never seen a Marx Brothers' movie, then you could easily start with this one. In my opinion, this is required viewing for any fan of comedy.

10/10