Skinner Box (Score 1)

I was on a plane with an in-flight entertainment system recently. One gentlemen a row in front of me played a slot-machine game. I am quite certain he wasn't playing with real money (he was profitable), and it seems unlikely that it would be some system of redeemable points or miles.

So there you have it: nearly the most abstract Skinner Box conceivable. He had two buttons on the screen to press ("bet max" and "spin") and a display telling him he had been rewarded.

He played for something like three hours.