Do Christian concepts of fellowship allow for a congregation to welcome atheists to participate in their community?

Due to family issues, I have come to distance people from me, mainly because the family issues made me a rough person and I am not "easy" to hang around. For the same reasons, I was never close to the Church or God. Now, being an adult and understanding the world, I find it hard to believe in any kind of religious creed. I am, in fact, an atheist. My question here is: is it considered *wrong* (by the same religious communities) to seek the company of religious communities (for example, going to the meetings of Jehovah's Witnesses) if it's for the sole purpose of feeling less lonely? *I am not excluding that I may, with time, find that particular religion suitable for me.