Minnesota has Main Ave, N. 7 clans casino. Pros: wonderful water park! Loved the lazy river, water slides (only one smaller one was closed), lots of tables, nice splash pad areas for small kids. Welcome to Seven Clans Casinos, the hottest gaming destination of the north! Whether you like playing slots, blackjack or poker, our casino is the place to. . Seven Clans Casino, Thief River Falls is a tribally owned casino hotel situated near Thief River Falls, Minnesota. The casino floor boasts over gaming machines (video slots, poker and keno) and four live blackjack tables so you get Las Vegas action and Northern Minnesota. 1 History; 2 Property. Exciting casino floor with over slot machines and 4 blackjack tables. Contents. A mile from Highway 59, this informal casino hotel is 11 miles from downtown Thief River Falls, and 33 miles from Agassiz National Wildlife Refuge. River and more. Casino, room all suite Hotel and Indoor Water Park featuring over slots, 4 Blackjack tables and 2 restaurants. Thief River Falls, MN info. Lots.