Anita: Dances of Vice (1988)
Anita: Dances of Vice (German: Anita – Tänze des Lasters) is a 1988 German film directed by Rosa von Praunheim. The film follows an elderly delusional woman who thinks she is Anita Berber (1899-1928), a German dancer who, with her partner, Sebastian Droste, came to represent the decadence of 1920's Berlin with their nude dancing, their cocaine habits and their uninhibited sex lives.
More at Wikipedia.