Thank you Costas!
Now i remember, that we had in Stuttgart Killesberg Park a Varieté/Cabaret in the 80/90th, with a lot of pictures (copies) of Zeybekes and Rebetes and also with concerts and parties.
And now i remember a taxi driver and Bouzouki player from Stuttgart Leinfelden Echterdingen, he laughed about me, because i, as a german, was interested by Rembetiko, he said to his friends: “Look, this man knows a lot about culture, wow, a german, interested by Rembetiko, a intellectual man, wow: culture!” and he laughed!
and now i remember that we listened shortwave radio - we reached two greek radio stations in Stuttgart, sometimes they played Rembetiko …