This July 12th and 13th in Santa Clara, California Extreme, a massive collection of pinball, arcade and video game machines will be set to free. For the price of admission you can play to your hearts content.
"California Extreme is the "Classic Arcade Games Show". It's an annual celebration of coin operated pinball machines, video games and other novelties you once found in game arcades. All games on display are set for free play, so leave your quarters in the ash tray in your car. You won't need 'em."