Pub quiz triumph and tragedy

So here's the story. We are at the regular Thursday night pub quiz at local pub The Boot - the scene of some heartfelt political discussion last week. Despite being a few members down, our team valiantly fights on, and we end up scoring 33/40 on the quiz, our best yet. However we are tied with another team. Pete had promised Paul (our rotund quizmaster) that if we won he would sing. We win the tie-break due to "amazingly good luck" (no fixing here. Hem hem) and then Pete steadfastly refuses to sing. Paul declares the other team the winners, and then hands us two instead of three bottles of wine as punishment for Pete's refusal to sing. Treachery to the cause or perfectly understandable behaviour? (Obviously I know which one is right, but I'm just presenting the facts without comment.)