Abstract: Small pentagonal prisms of regular pentagon cross section have two opposite end faces and five circumferential side faces. The prisms are marked with indicia to indicate uniquely on which of the seven outer faces each of the prisms is resting. The length of the prism, i.e., the distance between the opposite end faces, is selected such that the probability of the playing piece landing on any of its seven outer faces is approximately equal. A layout intended for use with a pair of such pieces has a multiplicity of different betting areas arranged in concentric pentagonal rings; and a gaming table intended for use with such playing pieces is of pentagonal shape having five upright peripheral sides for retaining a pair of playing pieces thrown therein by players.