As I searched the web for the Smokey Banana's site I see where it won the Westwood Denver's Best Place to get Coffee and a Tattoo. Like does it have any competition for that award? (Considering I found the pic of "Smokey Banana's sign from first position on a Google image search of 'tattoo coffee', I'd say they have cornered the market.) And from the Westwood review, it looks like that market is the biker crowd that craves skinny mocha lattes.
I wonder what other combos are potential business ventures?
Bar & Funeral Home - Robin suggested that one.
Gun Store & Donut Shop - You could call it 'Cops & Robbers'
Malt Shop & Tanning Salon - Shake & Bake
Laundromat & Bike Shop - Spin Cycle
(Maybe if any readers out there, they can suggest a few.)