I don't think so !!!!! There are no Harrah's properties in Colorado. In Black Hawk you can park in the Golden Gates/Mardi Gras Casino parking garage, but it's gonna be a long walk to the High Limit Lounge at a Harrah's property. I recently heard about this card or some similar to it being issued in Lake Tahoe but there's no Mardi Gras casino there. So, if Harrah's took over the Showboat property in E. Chicago which was the Showboat Mardi Gras casino, then I'd say this card was from that property. I don't keep up to date on changes in casino ownership, so can't say 100% for sure that this is correct. Perhaps someone in the Chicago area (maybe Fred Jezuit) can help us out with this.