Wild Innocents(1981)

Six teen girls arrive at Camp Red Duck. They're there, as their camp counselor, Laurette, reminds them, "Because your parents were too lazy to take care of you this summer". Two, Mary and Susan, walk in and are never seen again. One, Joan, decides to make the best of the situation and begins working her way through the male staff, beginning with the camp director, Mr. Wasserman. The other three, Wendy, Lisa and Jennie, are virgins but don't intend to remain so. The three make a bet. The first girl to lose her cherry will command the other two for a full day.