Yes I went there a few years ago.
It is a small house near the Red Light district.
You go in and the boys introduce themselves, one at a time, and have a quick chat with you.
You then tell the Boss which one you are interested in and go to one of the rooms. A few mins later the chosen lad comes to the room.
All very civilised and at standard prices (similar to UK and Amsterdam) at the time.
Well worth a visit. There were probably 10-15 lads there.
All a few years ago so take some more up to date advice if you can.
Gerefan