In the book Superfans by Pat Flynn, he writes,

Followers may "like" an Instagram post. Customers may buy a product. But "Superfans" will be your biggest supporters. They will promote you and your products because they know you have made a difference in their lives. They will tell their friends. They will send you encouraging emails. They will connect with you and your other fans.

A tribe of superfans will help get your restaurant on the minds of people that no amount of advertising will ever reach.

But don't just take our word for it; read the book.‍
Pat Flynn, Superfans: The Easy Way to Stand Out, Grow Your Tribe, and Build a Successful Business