Comment: but why is it a "public accommodation"?

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but why is it a "public accommodation"?

Why does me wanting to sell coffee from my own property suddenly make my property a "public accommodation" and means my right to freedom of association goes out the window? I can give coffee for free to those I want to give it to, and exclude anyone I want to exclude including keeping them off my property entirely; but if I sell the coffee instead of giving it away everything changes?

Maybe he's just talking about anti-discrimination laws, which do say that if I want to sell the coffee I have to agree to give up the right to decide who can be on my property. But then he applies it to guns, and many businesses do ban guns and laws generally seem to back them up on that. So I'm confused about what exactly he's saying.