I know a friend of mine in South Dakota says that her university's cafeteria only serves fish on a Friday (which she considers following the letter of the law, not the spirit) and another in Germany says that his canteen on a Friday always serves fish not meat (in addition to the kosher, halal and vegetarian options) - that's in a Catholic region of Germany.

But I've never in my life known a single Catholic in person (I was raised outside of the church altogether, would have been Church of England anyway) so beyond that I really can't comment.