I wouldn't think so because I think that it classifies of freedom of religion. I'm asking because for special occasions like Thanksgiving and Christmas my fiancée and I like to say blessings over our meals and this year for Thanksgiving we're going to Perkins. Now back in the day that wouldn't have been a problem at all and I am less worried about attracting attention than I am about when it comes to today's day and age of persecutions against Christians.
It's okay Road Runner. If we're needing anything these days, it's thanking God for the food wherever we happen to eat. Prayer was part of the Last Supper with his Disciples, and according to the book of Luke:
Luke 22:19 says, “And he took bread, and gave thanks, and brake it, and gave unto them, saying,
"This is my body which is given for you: this do in remembrance of me.”
Also here:
- So shine your light before men, that they see your good works, and glorify your Father that is in heavens. YLT so let your light shine before men, that they may see your good works, and may glorify your Father who [is] in the heavens.
My grandfather taught me when I was young that the Bible was written in such a way that the average person could understand what it meant. The Last Supper is told by different gospel books, so I would say to you trust what you read and understand its meaning. You don't need any other teacher but the Word of the Lord, or basically, the Good Book.
When I see people in the same restaurant I'm eating in, I've seen them join hands in a family circle (or a circle of close friends) and thank God for food, fellowship, and it touches my heart that our God gave us freedom to follow Jesus' teachings as we understand what we read in the Bible. To me, it's a total blessing to see a family of believers bowing heads, closing eyes and thanking God for all his blessings. It makes me feel like we are not alone in our faith, even though the people may be of another Church than Presbyterians. We laugh at ourselves and say that we are the "frozen chosen."

It's just a humor, but I think I heard it first in Albany Oregon where the church was led by a very scholarly clergyman, and he used jokes frequently that helped us laugh and not be too morbidly preoccupied with solemnity. We moved a lot when the kids were young.