The business has the right to set its rules. It could mandate that anyone wanting to enter the building had to wear a green hat and red shoes if it wanted. The customers would have the right to terminate their accounts there too, but if they wanted to do so by entering the business they’d still have to wear the colorful shoes and hat.
But they don't for some reason.
Hmmmmm....
Time for some lawsuits.
Note to businesses still pulling the mask BS: Lawyer up.