Another of First National's successful Jack Mulhall-Dorothy Mackaill vehicles, Ladies' Night is a toned-down adaptation of the venerable stage farce Ladies Night in a Turkish Bath. Womanizing ironworker Speed Dawson (Mulhall) promises to change his roving ways when he falls in love with lunch-counter waitress Helen (Mackaill). Shortly thereafter, Helen's parents (James Finlayson and Sylvia Ashton) unexpectedly strike it rich. While Ma Slocum goes on an expensive diet, Pa Slocum goes out on the town. Pa and Speed accidentally meet at a stag party held in a raucous nightclub -- while next door, Ma Slocum and Helen relax at a Turkish bath. Inevitably, Ma and Helen get locked out of the establishment clad only in towels, just as the nightclub is raided by the police. The fun really begins as Speed, Helen, and the Slocums try to avoid each other while simultaneously evading the Law.
by Hal Erickson synopsis