Any business open to the public must have public accommodations and has to follow all kinds of federal, state, and county rules. They are not private property like your home, they are public places. As such, they cannot impede your free travel without legal reason.

There is no legislation (law on the books) requiring masks or quarantine, so unless you are breaking an actual law, stopping you from moving freely or holding you is false imprisonment, calling the police is knowingly filing a false report, and in between there is assault if they verbally abuse you, battery if they touch you, and if they get gross or nasty, hate crimes or sexual harassment or assault.