Surflight Theatre’s last main-stage musical of its 2023 summer season is “Grumpy Old Men,” which will run through Sept. 24.

It’s based on the 1993 movie of the same name that starred Walter Matthau, Jack Lemmon and Ann-Margret. The movie followed a long tradition of filmmakers and, especially, television producers poking fun at country folk – think of the “Ma and Pa Kettle” franchise and the CBS comedies that were so popular in the 1960s such as “Petticoat Junction,” “Green Acres” and “The…