I wasn't suggesting that you must pray. The reason I asked this was because we used to have some good friends who we spent a lot of time with. Somewhere along the line, her step-father pushed religion on them and they became very much under his control. We were at our house one day and ordered out for pizza. It was a very casual circumstace and they knew very well I was an atheist. I was about to take my first bite when I was interrupted by their insistance that they pray first. I shrugged and stated it was just pizza and we weren't even sitting around a table. They got very indignant and stated that by me not praying I was basically showing their young children I didn't love them and that I was causing them to be traumatized. Mind you, I hadn't made a big fuss about it, I was just surprised that they were insisting on it. I grabbed my slice and told them they could pray, but not to include me. The friendship started fading about then when they started interjecting "the Lord" into every sentence that came out of their mouth and told us we could no longer be friends if we voted for Clinton for president (we had no intention of voting for him and they knew that).
They could easily have done their praying and let it go at that, but it turned into a control issue that got my defenses up. I have been in more than a few silmilar situations, but mostly I just get a dirty look when I don't join in. Real friends know and accept me as I am.