No go in Azusa, CA. Someone should put it in the wiki. I think CA is excluded. Some theaters including AMC 16 in Burbank, CA dont charge extra for IMAX or 3D (at least a couple of times I tried, please call dont quote me on it)**snip**
I wish I'd checked here before I went there today.
I just looked at the signage ($16.99/2) and turned around.
Did you try at the register?
Sometimes the signage isn't up to date, but the last 2 times it was signed correctly.