Imagine that your character goes out to eat with friends. He orders a number of drinks, appetizers, an expensive entree and a desert. The food is delicious. The service excellent.
The bill comes. Each person is expected to contribute their fair share, with tax and tip.
What does your character do? Does he contribute an appropriate amount of money or short-change the rest of the party?
On the other hand, what happens if he tips amply but the others don’t? Does he say something?
What happens when everyone pays with cash except for one person who pulls out a charge card? And that person collects the cash and stuffs it in his wallet. How do the others know how much he tipped? Do they say something or accept that they’ll never know?
On the other hand, what if your character doesn’t pay for all he ordered and consumed? How do the others feel? What do they say and do?
Your task is to write the story.
Have fun with this one.