You seem to forget that the state licenses the business. In obtaining the license you agree to abide by the rules. The state sets the rules based on input from the owners and patrons. The state does not "barge in on your private property". It has the right to inspect your commercial business that uses access to the public commerce. If you want to play on their field you have to play by their rules.
If you want to play on their field you have to play by their rules.
There it is: fascism/socialism rearing its ugly head: It's not the property owner's domain it's the domain of the government.