I have enjoyed seeing students bringing your friends into the chess world. Teaching an acquaintance is a path to deeper friendship. Teaching any skill to another person improves your knowledge of the skill.
It is possible that your teachers need refresher lessons on playing chess - maybe they have never played before. Invite your teachers to learn chess from you! Have them come down to see what we are doing in the library. I assure you - they will appreciate the invitation to a lesson.