This relaxed, adult-only casino hotel is miles from Central City Opera House in the historic downtown area, and 12 miles from Argo Gold Mine and Mill. Grand Z Casino Hotel is in Central City, Colorado and is open daily 24 hours. Since purchasing it. . Grand Z Casino Hotel, Gregory St, Central City, CO See 40 customer reviews, rated stars. See traveler reviews, 91 candid photos, and great deals for. The casino's 31, square foot gaming space features gaming machines and. Browse 52 photos and find hours, phone number and. Now $92 (Was $̶1̶0̶4̶) on Tripadvisor: Grand Z Hotel Casino by Red Lion Hotels, Central City. review of The Grand Z Casino Hotel in historic Central City, Colorado. The previous owners were more like a "Hard Rock Casino & Hotel". Grand Z Casino Hotel in Central City features a casino, a bar and a restaurant. Reviews ; / Cleanliness ; / Staff & service ; / Amenities ; / Property conditions & facilities ; / Eco-friendliness. One of the best details about Grand Z Casino sports betting venue is that it's open 24 hours a day, seven days a week. The slot and video poker machines range in price from pennies up to. Free WiFi is provided. You can even book a room. Grand Z features gaming machines and eight table games but does not have a poker room.