The arcade uses quarters for gameplay, which can be purchased on-site.
Game prices are very reasonable, with options to buy bags of quarters for $1.00 or $5.00.
Pinbug Pomona hosts Pinball League nights for enthusiasts to compete.
A few nearby places worth checking next.
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How did I not know these places existed?! Atly's scoring is a lifesaver, now I can finally find THE spot without wasting time Googling my life away.