Loves of a Blonde (1965, Milos Forman)

Opens with a catchy pop song about turning into a hooligan. At least half the movie is the party scene (dudes chasing after blondes) and her at the musician’s house with his parents, waiting for him to come home (blonde chasing after dude). Forman must’ve stayed in touch – the blonde cameos in Amadeus.

One love of a blonde, a dodgy musician:

Dave Kehr called it “certainly one of the most sweetly seductive films ever made, an ironic quality in a film whose main theme is the cruelty of seduction and its costly aftermath.”

Harsh party scene, soldiers have a bottle of wine delivered to the wrong table of girls: