No:
"When Walt Disney first designed the Magic Kingdom, he made it clear that alcohol was not to be sold. The concept for the park was to be “family oriented” with children and their parents enjoying time together. Much unlike what happens at some carnivals, state fairs, or non-Disney theme parks, an adult member of the family would not hand out tickets and allow the kids to adventure on their own while he went to the bar or beer stand."
Ignoring the kids to ride alone so the adults can stand at a bar is a far cry fro dad having a beer with dinner while you all eat together.
Actually parents showing how they drink responsibly is good role modelling for their children as they get older.
I think this would be more of a sign of an alcoholic "Hey I would like a glass of wine, instead of just having a glass here where I am eating dinner I will need to leave the park, catch a monorail to go to a bar"