Yes, places for angry lesbians to beat the hell out of any willing men did indeed exist in Berlin after WW1. And they were quite popular because the tourists came to try new things, so why not get whipped by a lesbian?
Don't expect this comic to get updated too often, because while I enjoy the story it's a pain to draw.
I'd have thought women in Berlin after both world wars would have lots and lots of things to get angry with men about... not the least being that Germany had just lost two world wars and caused everybody else quite a few years worth of suffering and deprivation, the brunt of which would have been borne by women! And if Germany lost, what was it, three million men killed in the first war and five or six million men killed in the second, that must have caused a HUGE gender imbalance. Women would have had more reason and opportunity to seek alternatives to heterosexuality...