The Pom Pom Girls
Dear God... https://www.youtube.com/watch?v=6h9EqROci-k
Roger Cornelison commented
I voted for this, because I remember it fondly from the drive-in days, but I seriously doubt that Rifftrax will do it because it has several topless scenes. BTW, it's not good, but it's an object lesson in how to make a movie with almost no plot and still keep things moving along.