This one was a mystery. The address is 921 S. Beach Boulevard, which came back to something else down the street; to the north is some ston-slathered place e that looks like the Flintstone jumble on the postcard. But then I think I found it. They added a second floor, but that has to be it.
(I don't know why I said that when I wrote this page, but I must have had reasons.)