A Day at the Races (1937, directed by Sam Wood) is the seventh film starring the three Marx Brothers.
Hugo Z. Hackenbush (Groucho Marx) is a veterinarian who is hired as chief of staff for the Standish Sanitarium, owned by Judy Standish (Maureen O’Sullivan), at the insistence of her most important patient, the rich Mrs. Upjohn (Margaret Dumont), who insists on being treated only by Dr. Hackenbush. The Sanitarium has fallen on hard times, and banker J.D. Morgan (Douglas Dumbrille) is attempting to gain control of it. Judy hopes that Mrs. Upjohn will make a large donation and stop that from happening.
Meanwhile, Judy’s boyfriend, singer Gil Stewart (Allan Jones), has taken his life’s savings and bought a horse with it, instead of paying for vocal lessons to further his career as a radio singer. His hope is that the horse Hi-Hat will win a big race, and the money will save the sanitarium. Unfortunately, he now has no money to pay for the horse’s feed, and he and Tony (Chico Marx), who works for the sanitarium, and Stuffy (Harpo Marx), Hi-Hat’s jockey, have to resort to trickery to fend off the Sheriff (Robert Middlemass)…
Groucho Marx as Dr Hugo Z. Hackenbush, Chico Marx as Tony, Harpo Marx as Stuffy, Allan Jones as Gil Stewart, Maureen O’Sullivan as Judy Standish, Margaret Dumont as Emily Upjohn, Leonard Ceeley as Whitmore, Douglass Dumbrille as J.D. Morgan, Esther Muir as Flo, Siegfried Ruman as Dr Leopold X. Steinberg, Robert Middlemass as Sheriff, Vivien Fay as specialty dancer, Ivie Anderson as specialty singer (“All God’s Chillun Got Rhythm”) and The Crinoline Choir as musical ensemble.