Definition of "Gallery" :

noun: a horizontal (or nearly horizontal) passageway in a mine

noun: narrow recessed balcony area along an upper floor on the interior of a building; usually marked by a colonnade

noun: a covered corridor (especially one extending along the wall of a building and supported with arches or columns)

noun: a long usually narrow room used for some specific purpose

"Shooting gallery."

noun: a room or series of rooms where works of art are exhibited

noun: a porch along the outside of a building (sometimes partly enclosed)

noun: spectators at a golf or tennis match