Situations like this can teach you a valuable lesson not to rely on someone's promise especially when you are both drunk the night you got the offer.
Yes..., it really teaches alot of lesson. But yet most people are not still ready to learn from their past mistakes. They still go ahead living their lifestyles in friends, family and neighborhood promises.
An example about a friend who spends for an early celebration is very upsetting when he found out he actually didn't win, yet he already spend money for the celebration. I would probably share an amount just to cheer up that friend.
That was exactly what we did. We are all friends so a shame on anyone of us is a shame on all.