It seems everything in the 60's was something “A Go-Go". Whisky A Go Go was located across the street from the El Cortez in the 1960s. Notice that on the chip it’s spelled "Whisky" and the coupon below and in the newspaper article it's spelled “Whiskey”
I'm not sure of the exact dates of the opening and closing. I'm not sure if there was gaming or slot machines and if it was part of the large and famous Hollywood California “Whisky A Go Go"
If you're too young to remember what a Go Go club was in the 1960s here's a good example from YouTube.