And wtf is UNSW, you retard? Also, do you really think OP wants to socialise with trashy cunts like you, who think Anglia Ruskin is a cultural hub? Networking with real Cambridge students is fulfilling enough.
OP - Cambridge is very diverse, especially if you choose a less pretentious college. Lots of college's are comprised of a majority of state school students. If you're really worried about getting admitted, choose a less-selected college (Churchill, Fitzwilliam, Homerton, Girton, Robinson, etc.). Also, there's lots of social mixing between colleges. You're not missing anything by not socialising with Cambridge locals/Anglia Ruskin kids.