It's no surprise that the people who actually bother to show up at an event like this trend older than the general population. After all I waited until I was 50 to show up. But amongst this group of earnest elderly is the only time I can say I was glad to see a couple of skinny emo boys. I guess you can't judge a book by it's cover.
There's one thing in common between musicians and people who participate in party politics -- they're willing to spend long hours doing something boring (practice vs party meetings) for the promise of an eventual payoff. Which dovetails with my observation that a Campaign Rally is like a rock show, only no one rocks.