Room Service (1938)

The odd one out: a one-off at RKO, adapted from John Murray and Allan Boretz's stage farce rather than built around the brothers. Groucho plays Gordon Miller, a broke Broadway producer who has sunk every dime into his new play and is hiding his cast in a hotel while he hunts for a backer. The play was not written for them, and it shows. The brothers squeeze into roles that fit like borrowed suits, and Harpo and Chico have far less room for their usual routines. Watch it as a curiosity, not as a sample of what makes them great, and not before the films above.