Tips for social life? (Incoming transfer)

Just decided to ask this here for some insight. I'm an incoming junior, and I'm really pumped to be attending. However, I have heard a lot of other people who've transferred to UW saying that they spent two years with very little friends and didn't experience many social events. I'd rather *not* end up that way. Part of this comes from my application coming back really late, which means I applied for housing late and I didn't get many good options for on-campus housing. I managed to find a pretty good and affordable apartment situation close to campus, though. I do feel that whole "missing out on the real experience" thing a lot of other transfer students feel, but I already spent a year lonely and bored grinding my way here so I'd at least like to make the best of my time. What's the *current* social scene like and what things should I check out to make the most of my situation?