Elderly in the library. Two groups clearly differentiated: frumpy / obese / stooped versus stylish / buff / confident.
Frumps rattle keys in pockets while searching confusedly for misplaced reading glasses.
Stylish tap the toes of designer boots while leaning back from eReaders, contemplating.
I would fail the initiation ceremony for either group. I'm confident to the point of being irritated with pretty much all the others; while clearly not giving two shits about clothes.
I'd gravitate toward the younger teens, if they'd have me. They're enthusiastic, and fun, and if they dye their hair it's an art statement, not a camouflage.