OK, the whole Hancock Street subject started because I was trying to convey why I was intrigued by Sunset Boulevard (it was nearby).
Ciro's nightclub was located at 8433 Sunset Boulevard in West Hollywood.

ucla detail
Formerly the Club Seville, which featured a glass dance floor over a pool filled with fish,
it opened in 1940 and closed in 1959. During this time it was one of the most famous nightclubs in the world.
Below: James Dean and friend at Ciro's in August 1955.

upi/pla

snap ebay

warner bros. cartoon
Below: Here is a1941 view of Ciro's a year after it's opening.

usc
Below: Here is a view of the club in 1947.

usc digital archive
Below: Here is a contemporary view of Ciro's reincarnated as The Comedy Store (quite famous as well).

Dave McGowan/Davesblog

Lindsay Shah

Lindsay Shah

wikipedia