I must have been 4 or 5 years old and I remember the dentist had a Popeye arcade machine in the waiting room. I remember playing it, but I don't remember using quarters. Which makes me suspect that I just jostled the controls around while watching the demo mode play, like a toddler does.
I also remember Pac-Man being in a lot of places.
Home console? I remember my friend got an NES and we spent all day playing Super Mario Bros. in his living room. His parents were even taking turns. When somebody finally made it to King Koopa in the first castle, I remember thinking it was so cool that there was a fire breathing dragon in the game.