Bang Bang (1970)

Two attractive girls pick up a young female hitch-hiker, new to the city. They give her some advice and directions to her destination, the beach house of an old friend. After purchasing more attractive clothing she is picked up and assaulted. Narrowly escaping, she finds herself on a beach crowded with weird hippies, bums and police. Finally she arrives at her boyfriend's house. Unknown to her, he has become homosexual and a strange situation develops climaxing in a lesbian ambush.

Unfortunately the movie Bang Bang is not yet available on HBO Max.