The clients walk through the corridors of the house (hence the name: Laufhaus/Walk House) to see and negotiate with the prostitutes.
As long as there isn't other crimes involved, like drugs or violence, and as long as you aren't shameless about it, like disturbing your neighbors.
Red-light areas in Prague could be defined as areas with brothels or other sexual activities.
If you buy your entrance ticket on internet, it costs only 99 Koruna, at the door it is a little bit more.
Price for prostitute in Prague for 30 minutes of sex in a private apartment is around 800 to 1500 CZK, while some women ask for less, such as 700 CZK.
An hour costs 1300 to 1500 CZK, and two hours above 3000 CZK.