Since I have an anecdote for every place mentioned in this thread, let me add that in 1989, I went to a birthday party that featured trips to (1) Little Caesar's and (2) Milford Jai Alai. (Hi Adam.)
We made our own pizzas at Little Caesars, which is where I learned that at gross chain pizza places, the "sausage" comes from a vat of pink slime, from which little balls are formed and put on the pizza before it goes in the oven. That's why the pieces of sausage are jagged balls.
But that was not even the most unsafe part of the birthday. As mentioned, we then went and played jai alai, which is an extremely dangerous game to play for untrained kids, and for which nobody signed a waiver.
But we all survived the pink slime and the heavy balls whizzing past our faces.