Haven't been since Year 6 when I was forced to by my school, apart from 2 or 3 weddings & family things - but when I got a bit older, around 16 I think, my dad just said I didn't have to go to family things if I don't want to. So I've missed a wedding and 2 christenings so far.
I don't plan on going in the near future. I hate churches. I'd only go for a funeral, probably. Nothing would make me want to go more.
And no, I consider myself to be an atheist.