Obviously, not Cactus Jacks in Las Vegas as the sticker on the back says. I haven't been to Jackpot, but looks pretty big to be Cactus Jacks in Jackpot, Nevada. Date of 1965 seems right given the men's narrow ties and hats. Only a couple of Las Vegas places had women dealers in the sixties, so more than likely a Reno location.

My guess would be Harrahs in Reno.