Assuming this (link) source is correct when it says "During the mid-1980's, the spot switched from selling coffee to steel belted radials in the form of Atlantic Tire and Auto Service, where it currently remains," you can see what currently remains of the buildings exterior here.

According to an article here (link) it was opened originally at 1010/1012 N. Fairfax on December 12th, 1964 by Don Pine and Harold Kisneff. Apparently, it was already the New Blue Grotto by 1968 according to newspaper.com searches I made.

Another Blue Grotto Coffee House opened at 1038 N. Fairfax some time before October 1970 (source).

Unfortunately, no more pictures. But a little information never hurts