Midnight Party (1977) on Netflix

A nightclub stripper hooks up with two playboys and ends up with an invitation to their midnight orgy.

Sylvia, a stripper attends a night party where the theme is a mock spy adventure. Unfortunately, she soon finds herself involved in a real espionage adventure when she is chased by Radeck, Agent 008. She hooks two playboys and ends up with an invitation to their midnight orgy. Her communist rock star bearded lover shows up in her dressing room and starts shouting slogans. Her husband pays her a visit. And then she talks directly to the camera, explaining to the viewer she has to get dressed for the party.