Office Cliques

Do you have office cliques at your library?  You know the type - you go around the corner and see them in a clinch and then they all stop talking when you enter the room. During department meetings they all sit together and talk amongst themselves while someone else has the floor and they always argue with any progressive idea that is mentioned because it would be too difficult for them to fix or adhere to in their department. They are barriers to change both professionally and personally.