Some of That Jazz is the fifth episode of Season 6 of Three's Company, and the 105th overall episode of the series. Written by Martin Rips and Joseph Staretski and directed by Dave Powers, it first aired 3 November 1981 on ABC.
Summary[]
When Jack tells Janet that her dance class isn't really "exercise," she challenges him to come along for a session. Jack agrees, but is in way over his head. He ends up leaving before the class is over, but not before he overhears Michael, the dance teacher, telling a student that if she wants to make it as a dancer, she'll have to make it with him. Janet comes home very excited and tells Jack, Terri and Cindy that Michael has asked her to dance in his show.