Hoi Polloi (1935)
A professor bets that he can turn the stooges into gentlemen. After many attempts to teach them etiquette, he brings them to a fancy society party. The stooges new found manners don't last very long, and the party quickly degenerates. By the end, the other guests have adopted stooge-like behavior and the stooges leave as gentlemen.
Directed by: Del Lord
Starring: Curly Howard, Larry Fine, Moe Howard, Phyllis Crane, Mary Dees, Poppy Wilde
Links: Columbia Pictures, IMDb, Movie posters, Movie stills