Well, knowing a lot of guys who come from Merced to play here in Modesto, I'd say Capcom VS SNK 2 and DDR Max2 or Extreme.
Those games are VERY popular here. MJC has a copy of Marvel VS Capcom 2 that still has lines to play.
And DDR is everywhere here and always occupied. Being that nothing changes "what's hot" wise in Stan. Country all the way down to Visalia, I'd say those two would do well.
Also, they have Time Crisis 5 at the Metreon in San Fransisco but the difficulty is set on "waste of money". >=\