This website stores all of it's data in a MySQL database. While this gives the illusion that each restaurant on the site has it's very own page, that's not actually how it works. Think of it like a template, where each restaurant's page plucks it's unique data out of the database, and sticks it on to the page. This system has enormous benefits, but it also prevents me from adding your own custom things to your restaurant's page.
But there are lots of options built in to our database that you might not be aware of. See the next tab for details.