Jean Kerr's, "Lunch Hour," takes place in the present and is set in the hip and swinging Hamptons—but don't give such outward signs of trendiness another thought. Mrs. Kerr has written just the sort of old-fashioned comedy that one expects from the author of "Mary, Mary": a romantic entertainment in which the characters are as civilized and charming as the stylish couples who populated Broadway drawing rooms a generation ago. And why not? There's nothing wrong with the old forms when they're in loving hands. As written by Mrs. Kerr,… "Lunch Hour" is a very slight, very warm and most amusing diversion….

[The main characters are] Carrie Sachs and Oliver DeVreck, summer people who meet as they discover that their spouses are off having an affair. "Lunch Hour" is about what happens when Carrie and Oliver decide to fight fire with smoke: They stage a mock affair...