You can still find arcade machines every now and then, but it's unlikely you'll find more together than what you'll find at a place in Branson, Missouri. It's seriously one of the great arcades left in the world.
I was in Hannibal in 1981. I remember what it was like then. If you would enjoy a flashback to that era, I've found a retro video drive-thru of Hannibal taken in the summer of 1981.