I just went to a Round1 near the Sacramento area. Half of the available arcade space was taken up by claw machines. I guess this is what they mean by the imported games. Other selections of games included a racing game a little more Gran Turismo like in that you could progressively upgrade a vehicle. It seemed this had the ability to save profiles but as it was all in the native Japanese text I'm only guessing. I fumbled through the menu until it let me run a course. DDR, lightspeed challenge, and some other rhythm/beats type games were there but I wouldn't call them anything out of a normal arcade. I went there hoping to find a vr headset type game, which they had, but every one was out of order. Then a handful of the old sit in a booth fixed gun turret shooters, and your basket shoot and see all type games.
They use a charge tokens to a card system which is fine really but every game costs 6+ credits ($1.50). Blew through 20 bucks in about as many minutes. That was my experience, take from that what you will.