Spruce up the Christmas dinner table so Grandma will pinch your cheek, impress the cute waitress at Olive Garden, or make the school cafeteria feel a little less like a prison mess hall with some of these napkin folds. Napkin art is a type of origami, but the medium is a lot more forgiving than paper and these folds are much easier then a Kawasaki rose.I'll say 'fold diagonally' if I mean it; otherwise 'fold in half' means orthogonally. Since cloth napkins are usually square, or close to…