Excellent set of images Phil! I enjoy the RPPC's as they really help me put the sense of a physical location to many covers in my collection. It gives them concrete provenance as well. It appears from the images that the "Index Club" (1940's? Not listed on the Fuller Index?) was later replaced by "Candy's Club" (1948-1954) in the same building. Both clubs being operated by the very Basque, Candy "Matas" Urizar.

Eric