The BEST city in St. Louis! Visit River City Casino for the best gaming and dining in St. Louis. We always have exclusive promotions and rewards. One million up. Oct 31, - St Louis MO, Southern Illinois have 6 casinos: Argosy and Casino Queen in Illinois and Lumiere Place, River City, Hollywood and Ameristar in Missouri. Argosy was the first riverboat casino to open in the St. Louis area in. Oct 13, - Hollywood stays hot among St. Louis area casinos That state's 10 riverboat casinos saw gambling revenue drop Statewide, gaming receipts rose percent, to $ million, among Missouri's 13 licensed casinos.