Shows the Gold Key Motel "open" and "close" dates as 12/10/1976 - 4/29/1982.

Click on this link for some photos of the Gold Key, over the years.

http://vintagelasvegas.com/search/Gold+key+motel

Near the bottom of the page is the same photo that you posted...in black & white, and in color. On the way down the page to that photo, you'll see a similar photo that was taken a year earlier (as evidenced by the Lido '76 sign in the background), with no mention of slot machines.