How to handle praying at meals? Most of my family is religious and while many pray quietly, my Dad wants to pray out loud over every meal. I go along with it out of respect for him, it does make me slightly uncomfortable but the prospect of refusing to participate is also uncomfortable.
It's a short prayer and a feeling I can probably live with, I do respect his faith and I trust his intentions are good. But that, along with invites to his church now and then, feel like "witnessing" tactics that I would prefer he not use on me. It feels like disrespect in spite of his intentions.
If your dad's prayers are brief and to the point, perhaps 'slightly uncomfortable' is a feeling you can live with. But if he goes on and on and the food gets cold, that might be a different matter. If there's a microwave handy, you might quietly make a point of putting your dinner in to reheat when he's finished.
If you don't respect his faith, do whatever you wish. My father's faith is legitimate so I remain quiet during the prayer, but avoid miming other aspect of the prayer's ritual that your family has.