Love this place, it's not just pinball, there are all kinds of other arcade games too for kids. All games are playable and there are plenty of coin change machines, so just bring lots cash, and a container to keep all the change in if you don't like them jingling around your pockets. The pinball machines are usually 50c for 3 balls, but don't underestimate how quickly those drain away. Some machines are 75c for 5 balls, which I prefer. There are some pretty fancy ones for $1.00 for 3-5 balls.
It's just one guy tending to all these machines so don't expect perfection. There are no fancy casino style attendants or drinks ladies. There are some attendants sweeping the floor or keeping the place clean but they are volunteers. Some machines are not very well calibrated. If you lose your money to a machine, or there was a malfunction, or a ball is stuck... just walk away and try another one. And yes there WILL be times when a machine eats your money, or the flippers don't work well... I don't like to argue for a couple of quarters. Did I mention all the money is donated to the Salvation Army? Yes, this pinball arcade donates hundreds of thousands of dollars to charity so just have fun and don't kick a fuss.
A great way to kill a few hours for cheap.