Yelp reminded me that I've had this bookmark for over 4 1/2 years... and I finally made it here this weekend. It's insane - so very many old pinball machines! It was so neat to play the older machines that you've never even seen before. I also really enjoyed the Pinball Circus machine - one of only 3 in the world - even though I sucked at playing it. ;) A good variety of machines here, but I wished all of them were functional. It's a non-profit organization though, so I can't complain too much. ;)
Free admission and several machines to give you more quarters.