when I started at this school we went into year 1 so all the other mums and kids knew each other. On day 1, they all gathered round and said have you time for a coffee? and about 10 of us went out which was great. I got to ask all the new area questions like where is the dentist etc.... still v. friendly with all of them - doesn't feel like a clique, but it wasn't exactly hard to 'break' in. I guess if I had shunned them that first day and not gone along to anything, they may not have carried on trying to befriend me for ever (i'm not that marketable!!), but generally if you respond with a smile etc, don't most people want some human interaction even if it is inane chit chat.....