Legend states that when cops would show up to the saloon, all of the staff and patrons would simply walk over to the other side of the saloon and therefore across the state line, thereby avoiding prosecution. Half of the club was on the Missouri side, and the other was on the Kansas side. The Last Chance Saloon was run by a mobster named Goulding in the 1950s before there were zoning laws. Last Chance Saloon: Located near State Line Road and Southwest Boulevard (where the QuickTrip now stands).Here is Jenkins's list of the five little-known historic mob locations in town: He talked to Central Standard's Gina Kaufmann about Kansas City Mob Tour. Gary Jenkins, a retired KCMO police officer, created a new app that reveals the history behind all of those spots. But what about the lesser-known mob landmarks? Many Kansas Citians have heard of the Union Station Massacre or the River Quay explosion - two of the more infamous episodes in KC's mobster history.