How old is the pop restaurant food phenomenon "chicken wings"?

I remember as a (very) young man being on leave in Las Vegas. Myself and some of my warrior buddies went to this place called the Elbow Room, where they had preserved chicken wings mounted on the wall on plaques, like trophies, for people who had eaten 20 of them or something. At the time, I thought the idea of eating chicken wings was pretty novel, since before that I figured they were one step above offal. How far back does the popular bar food preparation of wings actually go.