I have David (wingsofmercury), who was born and raised in NYC. He's 22, med school student, so I'd say he and Charlie could have grown up together.
I also have Spence (dogboyspence), who is 20, drummer for Panic. He's pretty famous, himself, and he has almost no plot.
And, you know, I pretty much have.. my whole list. With the traveling thing, she could easily have met any of them and I have my whole list right here.
And I don't really have anyone Cole's age in Chicago, but if any of mine jump out at you, plotwise, I'd be glad to do something with him, too.