Montreal’s Trio François Bourassa seems to have a direct line to the lyricism and invention that characterize the best work emanating from the jazz tradition. The ensemble’s latest, Jeaune-Vieux-Jeaune, is notable for its lithe and original takes on swing and its frequently intriguing—but never pretentious—harmonic and melodic conceptions. At 9 p.m. at One Step Down, 2517 Pennsylvania Ave. NW. $7.50. (202) 331-8863. (Reuben Jackson)