Yeah they closed 2 or so years ago, sadly. That was the place to go for Bemani in SD back in the day.
The closest thing now is
Howie's Game Shack, which is between Oceanside and LA. It's not a bad drive for me since I live in Carlsbad now, but if you're going to go that far from Central/Southern San Diego then you may as well go the extra 30 minutes to A.I.
Sorry man, SD kinda sucks now. :/