At the Shell station on South Dixie Highway at SW 27th Avenue, Miamians stream in and out, jockeying for pumps, scoring cigs and lotto tickets, and amping up on Red Bull. But head to the back of the otherwise standard gas station's store and you'll find smiling ladies serving breakfast fare, pastelitos, made-to-order sammies, and, most important, Cuban coffee. They'll make any of the usual suspects, but it's their painstakingly prepared coladas you'll really remember. Order your café with a polite por favor and they'll serve it with a smile. Stack cups for sharing atop your Styrofoam treasure and head out to the parking lot. Drink up. It's jet black. Piping hot. Heavy con sucre. Blindingly potent. Screw Starbucks — this is how Miami does coffee.