My DD had a milkshake for her drink at 50's. Aunt Janice was our waitress and she was awesome! She reminded us of Hazel from the old TV series. The kids loved it there. It was their favorite place!
BTW, we were also allowed shakes/smoothies as drinks at The Grand Floridian Cafe. The waiter there was very "gracious" and brought DD a huge hamburger plate (not the kids menu one), and gave DH and I both $4.00 bottled Evan water. He also gave the kids huge Hagendas ice cream bowls for dessert (again, not the kid sized ones). I think our bill there was the largest. I suspect some of the wait people like to rack up the bill since their tip goes up and is all paid for with the dining plan.