why penny slots. What a lot of people don't relize is that in most penny slot machines if you bet the maximum, you are actually betting more then the max bet on a quarter machines. Also according to several things I have read, penny slots payout a much lower percentage than quarters and dollar machines. i am sure some of our readers who are more framiliar with casion operations can clarify more but that is what I have read. One other thing about slot machines, the airport and gas stations, are the worst places in the country to play the slots. They are not worried about repeat business like casinos are, so their payout percentage is much lower then strip casinos.