It's a group of 7 people, they'll be fine. If the NLDS goes 5, I will most certainly be bailing on a concert with 1 other person. Did you stop to consider that David is the one that connects all of this people? Maybe he's the hub. Maybe all of their connections are routed through him. I actually kind of am. My niece, my nephew who both would be bummed if I didn't go. Have friends from different circles coming, plus a girl I invited who is really excited to go. I'd be a lame friend and a shitty uncle if I bailed. Also, I'm very excited about the concert and do not want to skip it, and if I really want to make the effort (and, mainly, have the willpower and some luck) I can avoid hearing anything about the game and watch it on DVR afterward. I would just rather a scenario where I wouldn't have to pick one over the other.