Poison sumac, Toxicodendron vernix, is related to the poison ivies and poison oaks, not to the other sumacs. It is relatively rare, compared to the other members of the family.
Definition of taproom in US English - a room in which alcoholic drinks, especially beer, are available on tap; a bar in a hotel or inn. Definition of taproom in US English - a room in which alcoholic drinks, especially beer, are available on tap; a bar in a hotel or inn.
A sunroom may be a room in a building specifically tailored to that function (with many windows and appropriate climate control), a connected structure erected during new construction, or one added some time afterwards.