If you read the Wall Street Journal online you may have seen a sidebar titled "Most Popular", which contains handy links to the 5 most popular stories in the online paper at the moment. If you clicked #3 you might have thought you got redirected to USA Today.
The 3rd most popular story in there at the moment is a gritty expose on why the police are getting called to break up fights so often at Chucky Cheese's.
If you've ever been to a Chucky Cheese, you're probably happy to be done with it. It's noisy, the food is terrible and at peak times it is way too crowded. That alone could lead to fights. Heck, the WSJ article could lead to fights. They go into a lot of analysis of the why of the parents fighting.
Parents are silly, over-protective folk. The atmosphere at these restaurants is designed to whip kids into a frenzy. Some times, hilarity does not ensue.