Everlong,
My school does that too, but I couldn't bring myself to go, I am pathetically shy. And I know the ladies who go along as said many times before already all know each other quite well.
Its the same at the parties now - they all know each other really well.
It not impossible but it is hard. If your already a little stressed about other things, or tired with young babies etc, it is hard.
Having said that I am also quite defiant. A Queen Bee mum was organising teachers presents and set a money limit, it was too much for us at the time, and I didnt like the teacher. She was quite rude about our offered contribution.
It would have been easier to contribute more but we didnt, and we hold our heads high. At the end of term I shall be choosing - if I want too my own gift for the teacher.