So it's okay for businesses to engage in discrimination and violate civil rights?
Businesses can choose to refuse service to anyone. That's private property, plain and simple. I'm actually MORE OK with businesses restricting CCW on premises than I am government. The government is public property.
Refusing service is not violating civil rights. You have no "right" to any product I offer as a businessman. I can elect to enter into a private contract with you for the purchase/use/lease of my goods or services. You can elect the same. Neither of us can force the other into such a contract.
That said... CCW "not allowed" postings are about as dumb as "pocket knives not allowed" or speed limit signs in private parking lots. And have about as many teeth when enforced.
How many of you do 5 MPH in the mall parking lot?