Many years ago (before my time of course) brothels were legal in Texas.
Remember the movie "Best Little Whore House in Texas" was based on a true story by a reporter for a Houston newspaper who had them busted.
A brothel can not be legal due to laws enacted by the good people of any given community, plus it's a health problem and a human trafficking problem at the same time.
A place like Amsterdam is not going to happen in the USA. They do have legal prostitution in Nevada, but it is limited to rural counties on rural ranches and is the only state that I know of.
Prostitution is however alive and well in the USA from one end to the other end.
Do your own research using "ladies of the night" and this is what you get.
Not exactly out of sight either so makes you wonder who's keeping the books ...
Know what I mean?