What happens at my park is a scooter rider and a biker trade bike for scooter for a lil bit, the scooter rider learns a few tricks, thinks its fun, buys a bike, bikes for a few months, realizes there not good at all, quits biking and gets back on a scooter.
Soooooooo gay, I always tell them thats exactly what they're gonna do and noone believes me haha.
I still bike a little bit, only trails though.