Ok, I know this happens in different sports, but I've only recently become aware of it
For the NHL playoffs, Montreal's Bell Center is selling tickets starting at $10 to watch the game - when it's being played in Tampa. For $10 you can sit in stadium seats and watch a jumbo-tron from far away and drink beers (small $7.50, large $15.50) while the actual game is being played in a completely different stadium 1500 miles away.
Apparently over 20,000 people are doing this right now. I kinda get this is an 'experience' sort of thing, but why not go to one of the hundreds of bars with better and cheaper beers and better TVs? ::shrug::