CUSFS usually shows one film every week during term. We try to have a unified theme for each term, along the lines of "animation" or "sci-fi through the ages", though the links may be somewhat tenuous depending what we want to watch. Easter (exam) term films are always comfort films, or films that fall in the category `so bad it's good'. We also like to have an "episodes night" each term, where people can bring along episodes that work as good introductions to their favourite SFF TV shows.
All film screenings are completely free for everyone, and at the right time of year screenings may be followed by an episode of University Challenge or Game of Thrones.