I wouldnt worry too much the people you meet in the first week are most likely not gonna be your friends when you leave uni.
Although i would recommend just walking around the hall and stuff.
Im a 4th year in St Georges (the hall next door to whitenights), i been put in rowanhurst block which is for all us 'oldies'. ATM its pretty quite and all the doors have locks on them so i cant go wander and make friends etc. Sucks.
Only building which is open is the freshers building and id feel weird going making friends with freshers etc.