I found a photo of the back entrance to Harrah's Thrifty Gambler (1968-1969) in Stateline, Nevada, which was formerly Harrah's Club. It was sold to Harvey's Resort Hotel at the end of 1969. The bigger Harrah's Tahoe was across U.S. Highway 50.

I don't know where the original photo came from. This is a video still from the 2005 A&E TV series "City Confidential" (Season 11, Episode 7 "Lake Tahoe, NV: The Casino Bomber").