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.
It is mentioned in various dated newspaper articles and is listed in directories for 1965-1969 at 631 Fremont.
I'm not sure if it was part of the large and famous Hollywood California “Whiskey A Go Go".
Notice that on the chips below it’s spelled "Whisky" and the coupon above
and in the newspaper articles it's spelled “Whiskey”.
The Fuller's Index Plus shows 3 approved licenses for an address of 1930 Fremont. Those licenses were never activated, have no date associated with them. I have no idea if those are related to the property at 631 Fremont.