I committed the sin of not joining any club at first year (save for SESOC where you're automatically in), but I plan to join one this year.
watch list:
kendo club (excuse to bring a wooden sword anywhere during class)
fencing club (not very sure..)
badminton club (excuse to bring a .. and scare people
)
chess club (is there one?)
go club (this one too, is there one?)
And I heard the volleyball club is nice, as my cousin promoted it one too many times. The revue societies are also fun i think.
and here's a humongous list:
http://www.studentguild.org/casoc/clubs/categories.php