There was a cool documentary that I saw that detailed the invention of Pong. The first unit had a modified $.25 box taken off an old department store horsey ride. They talked a bar owner into letting them place it in his tavern next to his pinball machine and dropped it off at 5 pm on a Friday.
A couple hours later their phone rings and it's the bar owner.
"We thought he was calling to tell us to get it the hell out of there, but instead he says, 'You boys better hightail it over here, your box is completely full of quarters and people are lined up wanting to play,'" Dabney said.
RIP, a true pioneer.