nommable fee
A nominal charged or debt payed with food and/or drink, esp. very good food or alcohol.

Nommable fees are often charged when the debtor is an amazing cook, or occasionally when they are unwilling or unable to pay their debts financially.
I didn't feel right charging Melanie for computer repair, and she's a damned good cook, so I charged her a nommable fee.

Bob won't pay up the cash I loaned him. He keeps asking if we can call it a nommable fee.