I played drums in church once. It was pretty awesome for me. No so awesome for the church since drums are not what I would consider my primary instrument by any means.
I was raised as a Unitarian Universalist which is pretty laid back in that you don't really spend a lot of time talking or thinking about God. While technically it's a branch of Christianity you pretty much just sit around a talk about how groovy every religion is. We had little celebrations for Jewish holidays and in Sunday school we studied Judaism, Islam and Buddhism just as much as Christianity.
It was pretty neat and I'm glad I got such a great experience of all these other religions. I haven't been to church in years though.