If you look carefully at the scene where the customers come into the bar for the opening, a couple comes in at the beginning of the show, they are celebrating their anniversary. The wife has NO speaking role, and therefore she is not mentioned in the credits. However, she is none other than Doris Roberts (who many years later starred on Everybody Loves Raymond.) Ironically, Doris Roberts HAD been on an earlier episode of All in the Family, with a short, credited speaking role, two years earlier, Season 6, Episode 24 "Edith's Night Out", as a bar patron in the same bar before it was owned by Archie.
This episode was videotaped on September 23, 1977.