A growing phenomenon on college campuses in the USA, they are essentially student-run athletic teams that compete intercollegiately, but not under their respective school athletic departments. Most operate with student-government funds, usually some sort of activity board, and run out of an on-campus gym or fitness facility. Unlike varsity athletics, there are no scholarships; students participate for the love of their sport.
References
College Sport Clubs Wikipedia(Text) CC BY-SA