Abstract: A convertible leg apparatus is provided for use with articles of furniture, such as for supporting two tables in abutting relation. The apparatus preferably includes a double-post leg assembly mounted to a plate. The plate defines a pair of parallel slots, each elongated along parallel axes, and a pair of apertures spaced apart from an end of each slot and aligned along the corresponding axis of the slot. The slots and apertures are sized to receive an elongated fastener therethrough. The underside of each tabletop includes a plurality of fastener bores, each of the bores being aligned with one of the pair of slots or pair of apertures. Elongated fasteners, such as thumbscrews, extend through the slots and apertures for engagement within threaded bores aligned therewith. The convertible leg apparatus can be engaged at each end of a tabletop, and optimally at the joint between the abutting tabletops.