Hemingway uses local color in this novel with his special emphasis on the setting and dialect of the story. Already, he has made countless references to places in the city of Paris, and often refers to streets and cafes by name. I wonder if all of those places actually existed at the time, or if they are merely made up for literary use.
"We crossed the bridge and walked up the Rue du Cardinal Lemoine. It was steep walking, and we went all the way up to the Place Contrescarpe. The arc-light shone through the leaves of the trees in the square, and underneath the trees was an S bus ready to start. Music came out of the door of the Negre Joyeux. Through the window of the Cafe Aux Amateurs I saw the long zinc bar." (page 83)
One place that caught my attention was the city of Biarritz. The people who met Jake and Bill on the train kept mentioning it. However, since they were traveling to Spain instead to go fishing with Cohn, they didn't elaborate much on what could be found there.