Why is Chuck E. Cheese so popular and yet it's so disgusting?

I have been to about four different Chuck E. Cheese places. Kids love them, but they’re dirty, noisy, crowded, understaffed, it’s impossible to find a place to sit, and the food is awful and overpriced. The birthday parties have zero creativity – they line the tables up and have several parties going on simultaneously, and the kids eat the awful food and then they’re released to play on the dirty, grimy games.

Why are they so popular?