I'm a first year undergrad... and a mature student.
It's nearly the end of my first week and I've yet to have anyone (other than a fellow maturey today) strike up a conversation with me. For some, even eye contact is a bit of a bother. I walk the streets between lectures trying to *look* as if I'm a "normal" student. Short of popping into Bess and kitting myself out with as much uni paraphernalia as I can, I'm not sure how else to fit in any better than I am at the moment.
So go on... if hugging is too much to ask for, at least strike up a conversation... or if that's asking too much, how about returning a welcoming smile?