Relationships take work.
David Meerman Scott says in his book Fanocracy,
To be successful in a world where fans rule, we must be convinced that relationships with customers are more important than the the products or services we sell to them.
What are you doing to build and maintain your relationship with your fans outside of your restaurant's 4 walls?
But don't just take our word for it; read the book.
Fanocracy by David Meerman Scott