As for dirty places: I'm not into banging prostitutes but my friends got some. One of them spent 800 Euros already
I did do an erotic massage in Berlin, though. The chick I had was actually hot. It cost 60 Euros for half an hour. You meet whatever girls are available and take your pic.
The street hookers in Hamburg were actually really cute, they just looked like regular attractive young chicks instead of bimbos. They have a red light district too, that's a block long. It's shielded from view and women are barred, presumably to reduce shame level

The ones in the brothels were mostly hot.
There was a brothel right next to our hotel that advertisee 39 Euro sex. No way would I want to be seen walking out of that shyt even at 3AM