What extracurricular activities are available on campus?
There are plenty of them! I will mention only some of them ( I don’t think it is possible to list them all). Student organisations: Consulting Group, filmmaking, cycling, Fashion Society, Visual Arts Society, The G-Spot (Protection for the LGBT community), etc. Sports: tchoukball, basketball, football (soccer), touch rugby, volleyball, badminton, field hockey, etc. Additionally, there are a bunch of dance clubs: ballroom, hip-hop, etc.
In summary, every single student at Yale-NUS has access to great opportunities to find themselves. Although quite a substantial number of extracurricular activities are already available on campus, it is always possible to set up something new.