If Ottawa did win the cup, the party would be over by midnight, because everybody "needs" to get up to go back to their government jobs at 8 AM. *yawn*
If Buffalo manages to recover, which I hope they do when the game starts in a couple minutes, there'll be rioting for days. First major sporting championship after who knows how many super bowls/stanley cup appearances. I know that I'm going to be partying every night if we get to the cup.