I too am a Yankee in the Bible Belt, although I did spend some time down here in my teens. What "they" will do is witness to you. You will hear how someone was once a shit his whole life, found Jesus, and now doesn't wear wife beater shits or drink etc. etc. Then you will get a Bible (KJV) as a present. "They" invite you to church. They best Southern Baptists have to go twice a week, Sunday and Wednesday. If you go, Wednesday is generally pot luck, so bring a dish. If their church doesn't have a pot luck dinner, find one that does, it is well worth it for the bananna puddding and red velvet cake alone. They don't mind you being an atheist, because they expect to convert you. After a few years when you don't convert, some of your friends drop out. However, if you go out of your way to be friendly and helpful, unlike typical yankees, they will think Jesus is in you anyway, and your atheism is all an act. DON"T MOW YOUR LAWN ON SUNDAY MORNING!!!
"On Earth as it is in Heaven, the Cosmic Roots of the Bible" available on the Amazon.
