River City is a 250,000 square-foot facility that features a 90,000-square-foot gaming floor with more than 2,000 slot machines and roughly 55 table games. Therefore, any future casino project cannot proceed until one of the 13 licenses becomes available. It’s also the 13th casino in Missouri, the maximum allowed by a state law approved by voters in 2008. River City is the seventh gaming facility in the St. The Missouri Gaming Commission voted unanimously last week to license the facility at 777 River City Casino Blvd. Pinnacle Entertainment’s River City Casino is scheduled to open its doors at 2 p.m.