So I was there last weekend and found out the hard way that last call at California Adventure is an hour before the park closes. Not a big deal, but I was hoping to grab a glass of wine to drink while watching World of Color. (This policy must be newish, because I did have wine with World of Color the last two times I was there.) It's not really a big deal, but it's kind of a strange policy, since Downtown Disney right outside the park gates still serves alcohol until much later - and
Disneyland Park was open until midnight that night. For those two reasons, it's not likely that the 8-9 hour of no alcohol service really played any part in drunk-driving-reduction.