I might be misremembering, but I think there was a similar show with the tall body builder guy who is a chef, and they would come in with a decorator and revamp struggling restaurants.

But the guy would sit down with the books and go through salaries, food costs, budgeting, and show them what they should be charging. They would look at the area restaurants to see what the competition was doing, and they would reset the flow of the floorspace to make room for enough guests to make it make sense.

Making good food isn't enough (although making bad food is enough to fail). Restaurants are a business, and while it's probably not good TV, most of them just need a financial review.