Dreams set in dining rooms are symbolic of relationship status.
If the feeling and events of the dream were positive, this means you are happy in a real life relationship.
If the dream was negative or frightening, you may be feeling nervous or guilty about a friendship situation.
To dream of being alone in a dining room, especially if you were watching others eat, means you are feeling sad and left out. You need more fulfillment, love and friendship in your waking life.