Ladies and Gentlemen,
Please forgive my potentially offensive subject title, this was not my intention but I couldn't think of a delicate way to put it

I want to start by saying that I am an atheist, for many reasons principle of which is that I was raised with no religion really (but still catholic coz thats how Ireland works :/ ) and when I thought about it it didn't seem to make sense to me.
My point however is why do people of faith feel the need to organize that faith into groups. By which I don't mean different religions or even denominations but into churches and congregations. Forgive me if I underestimate the need to spread your faith through preaching so to speak but it seems to me that if you believe in a god or gods that should be enough shouldn't it?
Now I may be missing something in this equation but if you live a good life by your faith standards and commune with your god/gods why should there be a need for communal worship?
I'm asking this general question here by the way because not many atheists would be able to answer the question and what I know of faiths other than Christianity is purely academic. I have lived in a country the vast majority of people are Catholics, can't name one under 60 who goes to regular mass though, and to be honest the difference between Protestant denominations if you will is a little hazy.
I apologise if I am offending anyone or just grossly misinformed, I just wondered this.
Claire xoxo