I reckon the best thing would be to look through the list of clubs (which can be found by googling "Monash clubs"). Keep in mind the sport clubs are listed on a different site, this includes things like dance, yoga (cant remember if we still do this), martial arts, etc.
Like every first year, you'll probably enthusiastically join 10 and never show up again. But that's all part of being a first year hey, so go nuts.
Regarding board-game club, they literally just sit in a room and play board games.
If you do join clubs, please buy an MSA membership. It'll give you $5 off every club you join. It's not just that but it has a whole range of other discounts and more importantly, you support the student union.
So whats in the showbag guys?