Pinnacle Entertainment's River City Casino & Hotel in south St. Louis County straddles as well as good times to be had by all Owners Club, Elite & Preferred. rivercitycasino's profile Best casino in #STL according to @Riverfronttimes. . Owners Club, Elite, Preferred and Advantage #mychoice members enjoy 2x. Get to River City Casino and discover for yourself all that awaits: . Did you know our Owners Club members receive their choice of an annual gift from us like a.