Where it gets tricky is places like shopping mall food courts. Some of the vendors sell booze and it can be consumed in the food court area. Many gun owners don't realize that if they are armed in the mall and stroll through the food court area where people can drink booze they are now entering a restricted area subject to the liquor laws.
A similar situation exists with various festivals on private property. Usually they have the booze drinking area partitioned off. Step inside and you fall under the booze and guns statutes.
In Oregon do they have places where you can drink in one part of the establishment but not in another? I don't think such places exist under Arizona law.