An article on Gizmodo provides a list of police reports dealing with run-ins at Chuck E. Cheese:

Brookfield, Wisc.: April 5, 2008

Seven Brookfield Police officers broke up a fight that involved as many as 40 people, according to police reports. The altercation broke out after an uninvited guest showed up at a child's birthday party. No one was arrested. (See police report.)

 

Flint, Mich.: Jan. 26, 2008

Flint Township police responded to a call about a large fight at Chuck E. Cheese's that involved as many as 85 people, according to police reports. A fight inside the restaurant between three females erupted, pepper gas was sprayed and people flooded outside the restaurant into the back parking lot. (See police report.)

 

Toledo, Ohio: Feb. 4, 2007

Police responded to the scene after a fight broke out. Several parents complained about children who were having their picture drawn at one of the machines and then continued to sit there after the drawings were complete. Parents began calling names and then throwing punches. Several people were injured and several cited for disorderly conduct. (See police report.)