In my head, I thought a lot of Indian Casinos were like the one by Topeka. Was surprised at how many are steel sheds on my last drive through Oklahoma.
There are 2 types of OK casinos. For each tribe there is 1 main casino that is usually pretty nice with a few good restaurants, buffets, & bars, a decent concert venue, a spa, & nice hotel. A couple tribes bought golf courses and built next to the course. They also have very good regional conference centers to fill the hotels during the week.
Those same tribes then have a lot of satellite casinos right next to the road where you can spend $1,000 gambling to earn $40 in points to use at the main casino. It's an amazing business model.