Amsterdam is banning all tours of its red light district from 2020. The Netherlands capital is also capping the number of people allowed on guided tours of the city’s medieval centre, which encompasses the red light district, at 15 per group.
So, if you go to Amsterdam be prepared to spend some money instead of just looking. Or, you can buy this Amsterdam Red light District Walk and Gawk tours t-shirt and let everyone know the tours have ended and you got the last t-shirt. Of course in reality, there wasn't an actual walk and gawk tour, but hey, what's reality anymore anyway.