Unfortunately, freedom of association has been dead for over 40 years. I find discrimination against blacks to be awful, and I would even consider boycotting a business that did discriminate, but I recognize that business' right to discriminate.
Where does the business get a "right" to discriminate when it is licensed to serve the public?
Its complete economic ignorance to discriminate.As if blacks,or Jews or Catholics' money isn't as spendable as other folks!