In the sixties, you could play pinball for money at the casinos. I played many games at the "bingo machines" in the back of the Nevada Club. These were the machines where you got more options in moving the bingo cards around the more nickels you put in. You never knew how many coins it would take, but after 30 or 40, there would be some relays and solenoids clicking and all kinds of new features opened up. There were no "flippers" on these, just a board with lots of holes to drop your steel ball in and bumpers so you could bump the machine and give the ball the last bit of energy to make it into the hole you needed.

I wonder when they were finally taken out.