Not puzzling at all! Just another street, with people and streetcars and shops. After walking a block along St. Ann, they pass Jackson Park, which is just getting into this new "spring" thing, covered in bright green grass and trees with pollen tags.

After passing the park, they turn right. Decatur street is the nearest street to the water, with the train tracks running between.

"It's the Big Easy T-Shirt Company, we're looking for. Specifically, it's sign, because it's on the second floor of the building it's in."