Restaurants are an interesting space but all around hard to make money in. Restaurants just don't like to spend money where it isn't absolutely necessary. So it's hard to sell them ads or online services.

You could look at letting restaurants claim their listings and offer them a pro package of services. Maybe menus, or even try offering online ordering. Being local you have an advantage that you can easily meet with restaurants in person.

I am always drawn to developing something for restaurants as their websites are notoriously bad, same with only ordering most aren't near as easy to use as they could be.

I don't think ad revenue is going to bring in a lot of revenue. Maybe $7 to $10 per 1,000 page views. So with less than 1k views you'll probably need to look at monetizing another way if that's your goal.

If you just want a fun website you can improve and run as a fun side project, keep going.