We've experimented so far without finding something satisfactory. The space isn't all that big, but we had a multicade down there. It looked awesome but we hardly ever played it, so we sold it to a friend. Next came an Iron Chef Pachinko machine (from a friend) and at first the kids LOVED it, but that wore off and it sat there not being played so it went to the garage.
We have a small table with some Sideshow Weta Lord of the Rings sculptures, and mostly I've focused so far on dressing up the walls with cool stuff, but I can't seem to find something that's a good fit to complement pinball. I would love to see a Ms. Pac-Man cocktail table down there, but I fear that we would yet again ignore it.
What can compare to pinball?