Loft (1985)

Sometime in the near future, set in an apocalyptic, dying world: Raoul and Raphaela, a young and arrogant upper class couple, are visiting an art exhibition of surrealistic paintings, hosted by a group of young anarchists in their bizarre Loft flat. After making love secretly in an empty back room, they suddenly find themselves caught by the aggressive Gang and being tortured both psychological and physical by their diabolical punk leader Furio, who blames "their likes" of being responsible for the war that destroys the earth.