Any post, chapter, camp, or other local unit, composed solely of veterans, of an organization composed solely of veterans which has been chartered by the Congress of the United States for patriotic, fraternal, or benevolent purposes, and which post, chapter, camp, or other local unit has, as the owner, lessee, or occupant thereof, operated an establishment for any such purpose for not less than one year, is a bona fide club within the meaning of Section 22 of Article XX of the Constitution and of this division.