Everyone pays cash, except for you?

Koreans have this term 카드깡, and it is used when everyone but one person pays cash for a meal or group bar tab. The group gives their cash to the person who pays the tab with a credit card.

커드깡 하지마! Means “Don’t pay with your credit card while everyone else is paying cash!”  It’s also as if you are using the others to be your ATM.

Original use of 카드깡 was to describe paying your monthly credit card bill by charging it to another credit card.