It is impolite to ask friends for money.
Brian is invited to go to the diner after school with his friends, but he doesn't have any money.
Brian wants to get something to eat.
Brian goes to his house to eat and meets his friends later.
Brian orders a burger and fries and then asks his friends to pay for the meal.
Brian hangs out with his friends later that same night.
Brian's friends never ask him to go eat out with them again.