I hate to say it but Golden State is easily #1. They have been absolutely terrible during a high majority of the past two decades and despite all of that, they have a very large and very strong base. They are always pretty high in ticket sales and their arena is usually loud. I used to live in the Bay so I saw firsthand just how diehard a lot of people there are.
That's why this model is stupid. from the looks of it they only used data from one season. You have to do it for the entire last 10 years at least.