|When i first came over to Melbourne for uni from Perth, i signed up to the mumc in the hopes of meeting some rock climbing partners, and I went along to one or two of their rock climbing trips. Personally though i found that I ended up doing most of my climbing with people that i had met at the climbing gyms or outdoors and not through the uni club. I think that's also because the few uni rock climbing trips that I did actually go on were more tailored to beginners - people who hadn't climbed before, so I found them a little boring, I never actually went on a trip where you could go and lead climb etc.
I think also at that stage i was really into climbing - it was a huge part of my life (i was missing friend's birthdays to go away for weekends, trying to spend all my spare time climbing), and so for me, I liked hanging out with other people who were also really passionate about climbing. Whilst i think for a lot of people in the uni clubs, climbing is more of a hobby or interest that they do, rather than something that runs your life. Not saying that is a bad thing at all, it's just differences in where climbing is as a priority in your life. So I think that's why I perhaps ended up not really doing much at all with the MUMC. Can't say though what it'll be like for you, and since you want to try other stuff to, it probably isn't a bad idea to join a club. My cousin does a lot of the bushwalking stuff with MUMC and she always seems to be having fun.
hmm well that was quite a long, rambling post. Hopefully it gave you one perspective on uni clubs! In terms of which one, I can say MUMC always seemed to have lots of trips of all different activities going on, and they've got a lot of gear and stuff you can hire etc