Pizza styles. You can only pick 3. If you can’t recognize them, they are–
1. Roma
2. California
3. St. Louis
4. New York
5. Chicago tavern style
6. Napoletana
7. Detroit
8. Chicago deep dish
9. New Haven

There's also this weird thing, which I've never tried. https://www.huffpost.com/entry/cold-cheese-pizza_n_59a8558be4b0a8d145742088