The musical is written by Annie M.G. Schmidt (do you know Jip & Janneke) and Harry Bannink.
I tried to translate a description:
" The story takes place in a guesthouse for revue artists in the ' 30. Josien, a girl from the provinces, is a new guest. She falls in love with gay singer Jules. And, even worse, she becomes pregnant by an unknown man. She uses abortus, tries to kill herself, but there is a happy ending.
It's a musical from the ' 70 with a lot of heavy topics, like abortus and homosexuality, in it. Although this sounds very sad, it's very funny and the songs are great.
A medley movie including the songs:
PS: Jip and Janneke.