Fun Spot '63 is the last of the "Ohio Dime Games" that Jeffrey Lawton has written about in "Bally Bingo Pinball Machines". These games award score rather than replays, and will retain your score from game to game, though it will reduce by 500 with each new game.
As Jeffrey mentions in tonight's correction, the games always required a single coin drop. At that point, it will tick down your score until it either runs out or lights all six cards.
Fun Spot '63 is pretty much exactly the same game as '62's model, but with a different cabinet.