(Disclaimer for the obtuse: This is a tongue-in-cheek post.)
Marketing: They support the Sports program. Sometimes they’re the Cheerleaders (plenty of funding), sometimes they’re the Band (but they have to buy their own instruments and sew their own uniforms).
Engineering: Chess, Math, Science clubs (obviously).
Services and IT: A/V club. Mr. Sanders can’t very well fix his own projector, now, can he?
Social Media Strategist/Community Manager: Glee, Theater clubs, the entire Arts program (first one to get cut in a budget crisis).
What am I missing?