School Spirit (1985)

Starts with a bunch of hot MILFs and college girls at an airport. One older chick with gray hair and a visor hands off tickets to a younger blonde—looks like they’re planning something shady. Then they all pile into a car, laughing and singing, but you can tell they’re not just driving to the hotel. The blonde’s got a tight little body, and the brunette next to her keeps touching her thigh like she can’t wait to get her hands on her. Later, the camera cuts to a dark room where some dude’s singing, but the real action’s in the backseat—girls grinding on each other, fingers going where they shouldn’t in public. No full-on fucking yet, but the tension’s there, and you can see where this is headed. Good mix of teasing and build-up, with a lot of close-ups on the girls’ faces when they’re getting worked up.