Great food, so sad that they charge you for using ...

Great food, so sad that they charge you for using credit, which is a little puzzling since they are most always packed with people. They caught me one time sharing my coke and charged me for another drink, why? I didn't even have a refill?
Oh well - good food, but a few little things that I did not understand.
I would keep going there but have since moved away.
My advice, go there enjoy the good food and just know you can't share your coke