For issues that take place in a restaurant, where the location of a restaurant plays an important part in the question. Can also be questions about interactions in restaurants (such as interacting with restaurant staff).
Situations that take place in a restaurant can be a form of social-event, it can be like this due to it being a night out with friends or work colleagues. There are other examples where it may not be a social-event, as it may just be out for a meal alone, or a meal with others in a non social event situation.
Questions here are about situations that occur in a restaurant setting, or where the location being a restaurant plays a key role in the interpersonal issue.
Can also be used with the tag social-event if the situation is part of a social event, however this tag should be used if the question is important to the situation taking place in a restaurant.