If Happy Days had kept this cast, I would have watched the show regularly!
(Yes, the photo is real. May Pang, with whom John Lennon was living at the time, said that she, John, and Julian Lennon were touring Paramount's lot during the filming one of the early Happy Days episodes, and this souvenir photo was taken. I'm always happy to find a John Lennon photo I knew nothing about, so this strange pop culture amalgam brought quite a smile to my face.)
(But you know, Happy Days would have been quite a different show had this been the cast, wouldn't it?...)