golden axe. only arcade game i ever played to the end.
i had a stack of quarters and other kids jumped in for co-op until one who was decent enough i just funded him until we beat it
went to a birthday or two where the parents rented one of those "free arcade rooms" where you got pizza and unlimited plays on like 20 cabinets
i really do think we need some kind of third space for social gaming again. obviously not designed to just rob you of money