Happy Days S08 E14 Hello, Mrs. Arcola

"Those were the days of the 1950's...filled with innocence and the promise of even better days to come."

Because she's never been to his house or met his mother, Joanie thinks that Chachi is ashamed of her. Fonzie invites the Cunninghams over to the Arcola's for dinner on Chachi's behalf. Fonzie surmizes that Chachi is embarrassed of his mother and uncle and of the fact that they're poor.