Pink Lady! I remember them. They had a one-off hit in summer of ‘79. Kiss In The Dark, which was kind of a disco song. They were supposed to be the next Abba but it never turned out that way.
the Pink Lady reference reminds me of the old Captain and Tennile show. the have children sit on throw pillows on stage dealing with things one level below Mr Rogers. My 13 year old daughter watches the Brady Bunch Variety Hour with the June Taylor Swimmers for laughs. She likes the 70s getups. in many cases, it is her first exposure to the black music of the 70s, but done by Bradys in medleys, and she herself is black! I don’t know if that is a crime or not