You are choosing to make it a gun free zone therefore violating their RKBA that shall not be infringed. Do you believe that gun free zones work? If you're open to the public you shouldn't be violating their rights.
this. really. not. hard. to. understand.
- - - Updated - - -
how are they violating any such right? No one is forcing you to go into the establishment. YOU are CHOOSING to. So YOU should assume responsibility for YOUR choices. Instead, go to the 2A friendly shop down the road to spend your money and carry your gun.