Shack Out on 101 (1955)

At an isolated, seaside greasy-spoon cafe live sarcastic owner George, potentially-violent cook Slob, and sexy waitress Kotty--the object of all the men's lust. Occasional customers include "Professor Sam," Kotty's boyfriend from a nearby research facility. And something's going on under the potentially-explosive surface emotions: nuclear secrets being smuggled out of the country.