Setting almost always impacts mood, regardless of book. Mood is how the reader feels when they read a passage. In Hunger Games, think of The Reaping and the setting there. It's in the town square, everyone is dressed up in their best clothes, the fancy people from the Capitol (Effie) are there with her pomp and circumstance, yet all of the residents of District 12 are deathly silent. The mood is tense and foreboding.
Another example is the arena itself. As the Games are about to begin, Katniss scans the arena and sees the Cornucopia with all of the weapons there. Whoever goes that way is walking into a bloodbath, so the setting paves the way for a dark, bloody mood for the reader.