[psook]

That's cool, but the world doesn't work by what you specifically call a public accommodation. There are dinner clubs with membership requirements (look here for a big hint as to how to continue refusing service to 'undesirables' legally), there are office parks with water fountains behind fences. The solution, if you don't want to do business with the public, is to not do business with the public. If you choose to be publically available, that's on you. Note: if your services require licensure, then it's not your right to provide those services to begin with--it's a privilege you've been granted and that will come with extra legal stipulations by that very nature.