It's not a-priori obvious that this is true. You could adapt the author's style to that case (maybe each vertical column would have a post-lunch grey zone) and

It's not a-priori obvious that this is true. You could adapt the author's style to that case (maybe each vertical column would have a post-lunch grey zone) and then argue the pros/cons. Even if it turns out this method doesn't work for restaurants, it would still work for stores, offices, libraries, etc.