The Coffee Vein
I don't know if an exploding heart is a good way to advertise your coffee shop, but it certainly seems to work for The Coffee Vein. Besides, I'm a bleeding heart for good coffee. You can find this caffeinated hot spot at 1545 North Stone Avenue.
The Artist's Signature:Update (June 19, 2016): Look closely at that signature and you'll see CyFi one, a.k.a. Rock Martinez. I spotted this while updating our article Rock Martinez in the Tucson Citizen, 2008.
Update (July 20, 2024): I compared the second photo above — the one with MOTORCYCLES ONLY — to Google Maps Street View. The photo is taken from the southeast corner of the building, facing north. It looks like the whole building has been replaced with a new one that now holds Enterprise Rent-A-Car.