The Lockers were a dance troupe that got their start as individual dancers on Soul Train when the series went national in 1971. Four years later, after the troupe was founded, the Lockers returned to perform for the first time as a group on the show. Don Cornelius does the intro and a subsequent interview.
At least three members of the group went on to bigger things.
Fred Berry (Mr. Penguin) is better known for his role as Rerun on What's Happening! and its sequel, What's Happening Now!. Berry left the Lockers in 1976, and I think that was when he was cast for What's Happening!.
Adolpho "Shabba-Doo" Quinones was later featured with Sister Sledge, if I recall correctly, in a video for their song, "He's The Greatest Dancer".
Toni Basil also left the Lockers in 1976, becoming a choreographer, and hit the top of the pop charts in 1981 with "Mickey".
Well, at least that's one advantage Soul Train had over American Bandstand......