I have emailed a Czech friend who is actually an assistant manager of a non-Marriott property. I did not mention the hotel name. I'll let you know what he writes back. My understanding is prostitution is legal in the Czech Republic but pimping is not, although that law is rarely enforced.

I always tell my nieces and nephews that one of the reasons we travel is to learn not all we think of as normal is normal everywhere. A cherished memory: We were in the Marriott CE when a man and several women walked past towards their rooms on the same floor. Suddenly one of my nieces had a light go on and realized many of the women were the man's wives. It took her a few minutes to get past, "But that's illegal" which she repeated over and over.