Rhetorical, Joesho or whoever might know

[Hell Puppy]

Nudes are generally going to be safe as long as they are of age and you're not openly advertising it in a unfriendly neighborhood. Hardcore or worse...some small towns will still try to call it prostitution or similar as it's "pay to fuck".

But it is going to vary not only by state but by county and municipality. Very similar to strip clubs or adult video stores. That's going to be your best source of information. Find the adult businesses in the area you wish to put it in and see who their legal representation is, seek consultation with them. If there's no adult business in the area, you probably dont want to be the first.

That's the safe play. Another way to do it is "do as the romans do". Check out OMP and see what other photographers and studios in your area are doing. Again, you may have to discreetly query them offline to see if they allow hardcore shoots at their facilities.

The stealth method is get the space, do as you please, just do not advertise it anywhere.

FWIW when we were operating our studio fulltime, we used all of the above. But then I'm paranoid....just ask Peaches.