Escort in Prague / Is it a dangerous to pick up street whore or hooker?

I'm going to be a Prague and I want to have a experience with street whore or hooker,but City Prague seems to be very safe,but they say it's risky to pick up street whore to hotel.
Actually,which one is right? Also let me know what street is best for picking up whore? I like mature women better than young one,anyway.