[jdillaaa]

Is a policy which discriminates against cash usage the best way to screen against the "behavior" of being dirty/smelly? Why not just ask him to leave if he loiters too long?

Instead, this policy clearly screens against a group of PEOPLE (those without access to electronic means of payment), which may or may not overlap with those participating in the undesirable "behaviors" I agree a restaurant should have the right to not tolerate.