Dude, there were guys wearing beanies EVERYWHERE! Just think of a Wonder Years show or Fireworks or any other new wave of pop punk band. That audience would be TSSF's audience no doubt. Yes there's going to be a good amount of teen girls there, but the majority is a sea of beanies, flannel and elitist attitudes.
Man I hate those people. But nah, TSSF actually have a higher appeal to little high school girls over the average Wonder Years or similar band. probably because they sing about Daughters and trying your best instead of moving into you parent's basement and college being hard. I totally get it, and while they should have a good amount of elitist tr00 pop punk douches at their shows, the small girl demographic will be covered much more extensively.