Quoted from jake35:if each game pulls 2.5 amps, a 20 amp single pole should be sufficient shouldn't it?
I have successfully ran 7 machines on a 20 amp. But it's not just about the breaker...the wiring needs to be the right gage also.
That said, if you "fried" the breaker, you either had a faulty breaker or you have bigger problems. It should have just thrown with no damage. I would not just replace it without figuring out what happened.