We stopped by the corner drug store to quickly pick up some things. Allergy medicine, toilet paper, and eyeliner. Don't judge.
"Do you have your ((insert company name)) perks/program/rewards/points/member card?"
"Of course I do. It's right here." (On the keychain with your three competitors' loyalty program cards.)
What type of loyalty are you wanting? Probably not the cheap kind. Probably not the kind that is just another form of competition on a keyring.
Are you helping your customers to not just think of you but to prefer you? To recommend you? To drive 3 miles out of their way because they know how different you are from the option right by their home? That's loyalty. And it's harder to come by than you might think.