First, good on you for being nice. Second, next time they come over have a naked chick (gf or sister if you're from West Virginia) walk down with a strap-on & ask if they're into pegging as well. Third, ignore prior option & just tell them while you appreciate their concern, you are quite content with your chosen religion (or lack thereof) & you have no intention of converting. However, if they still need to pray for someone, tell them to pray for you. It'll at least make them feel better & you can get rid of them without being an ass. Side note- If they continue to be pushy you could just say that if they don't leave you alone you are going to squirt mustard sauce on them. Or kick their ass, your choice. Go with the mustard. I hope you live in my neighborhood because I want to see people being chased by some dude wielding a mustard bottle.