Practice Makes Perfect(1973)

Original title: Geilermanns Töchter - Wenn Mädchen mündig werden

When the good citizens are already in bed, things get busy at the local pub. The regulars have a lot going on and no skirt is too short and no girl too young for these horny guys. Of course, things can go wrong, especially when the girls are willing but inexperienced and the punters are too lascivious. Fortunately, there is a disreputable but very popular establishment in the small town. There you can let off steam to your heart's content.