Time for a reality check here. The business is for kids... but kids don't have any money. To draw the kids, you need to appeal to the parents. You're already subjecting them to dancing robot mice, ball pits, and screaming kids (not to mention, terrible pizza). Any little thing you can do to make it suck just a little bit less, the better your chances are of surviving as a business.
Plus, if you think that pitchers of watered down beer is going to turn a Chuck E Cheeze into a great big bar fight.... that's just not true. Time for some perspective, it's beer & pizza.