I just started a new job and I can totally relate! Instead of sitting in the hall alone last night, I went to the nurses station to join the conversation. At first everyone was friendly enough, then they went out to smoke(which I don't). I got paranoid that they went out to talk about/get away from me. Just when I convinced myself that I was wrong, they came in and gathered at the end of the hall. Worst thing is, that's the nice hall- in 5 hours I have to go back and work on the unfriendly hall!