Drop Out (1973)

Billie drops out of college, and goes hitch-hiking. Soon, her beauty gets her a place in a lecherous tourist's car, whose next stop is a roadside hotel managed by a neo-nazi and his wife. Next morning, abandoned alone, and with no money to pay the hotel bill, Billie has to find several degrading ways to earn a living. With so many people eager for sex (a lesbian stripper, a photographer, a porn film director and his two nubile stars...)