If the sporting event isn't the Super Bowl or any major championship, then I wouldn't want to go. If an All-Star game count, OK, but if not then why go. It doesn't matter who you rout for or what sport, a regular season game is plain unless it means something. I would only go to a game if it meant a championship, a play-off spot, or be part of history.
Live concert would be my choice, but I would have to know the band or singer, and kinda like them. If I don't know who's playing I wouldn't want to go. Also, they must have more then one hit. It doesn't matter if they have 2 or 3 hits, at least I won't have to wait for their only hit all night.