At school, we’ve been doing house plays this term. We would stay quite late at least twice a week if not more to rehearse, so would all chip in to get some food. This one girl, we realised seemed to always manage to skip paying her share but would actually end up eating the most. 

When we confronted her, she said it wasn’t made clear at the beginning she would have to chip in every time and so refused to pay at all. To this day, she has not paid any of us back.