5.Bad Customer Service. This is an obvious reason for any restaurant closing. But I still think it is worth repeating. Customer service, along with good food, is integral to staying open. Therefore, don’t shy away from getting customer feedback, whether in the form of comment cards or just asking patrons how their meal is. I’ve often heard that for every customer complaint you get, three more are left unsaid. If that is true, then there are a lot of unhappy dining patrons out there who don’t bother to say anything. And they don’t bother return to restaurant they think have bad service, either.