Yes, it's sad how little attention that period of German history gets especially abroad. Babylon Berlin is a fantastic German TV production that captures the cultural side of the late Weimar period very well.
Of course, the musical Cabaret as well. Based on Christopher Isherwood's writings.
Unsurprisingly, the film sanitizes things a little bit and makes it into a Liza Minnelli star vehicle--which actually improves on some book problems with the stage version but sort of makes it less interesting overall. Still worth a watch though. The stage version is still playing in London.
The play uses the idea of being able to phone another table as well.
I just watched this for the first time a couple of weeks ago. Enjoyable film, though I actually cried at the end, knowing what was about to happen there.
To get an insight into the time, I can highly recommend reading the diaries of Harry Graf Kessler.[1] Extensive excerpts are available in English translation under the title: "Berlin in Lights".
