Flats as in the "middle" piece with 2 bones? Me too. Grab the end, stick wing in mouth up to fingers, (be careful not to bite finger), bite down somewhat gently, pull bones out. If cooked correctly, meat all in mouth, clean bones not in mouth, ready to grab another.BWW was a weekly thing with my friends and I when I was younger. I always got the boneless wings. Until now it never occurred to me that they weren't really wings. I never gave it a thought at all.
I prefer the bone in now and will take the flats.