The 56 Bus with a few diversions will avail you of the heart of Chicago coffee culture. For a curated tour, I’ve set up a Foursquare list called Coffee Corridor. It’s unbelievable how many excellent coffee roasters and purveyors have set up shop along a single public transpo line. Also note that the Blue Line works too. Furthermore, I suggest stopping half way at Chicago Avenue, grabbing something from Big Shoulders (and checking the 66 Bus), then diverting west to Asado Ukrainian Village and Star Lounge.