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 Stone Avenue.
Update (June 19, 2016): Look closely at that signature and you'll see CyFi, a.k.a. Rock Martinez. I spotted this while updating our article Rock Martinez in the Tucson Citizen, 2008.