You can post it under Europe, preferably with "Germany, Stuttgart" (for instance) or Germany Stuttgart DreiFarbenHaus or whatever its called in the title, which makes it more easily searchable. I've reviewed that one, as well as the RLD a few blocks from there a while back. Did you?
Btw at 3Farben there's was some old cunt at the entrance some of the time when I've been. But it seemed to me that he'd also wander off for a smoke at times as well. Not saying your bag wouldn't have been safe unattended but not my style.
I've only come across two styles of Eros centres but they're basically the same, some are just bigger. They're not what in Germany are mostly called 'brothels' although they like to advertise themselves as such sometimes. A brothel usually has several girls working under a central management, whereas the Eros centre rooms are rented individually by the prossies.