Like Louis Armstrong before him, Dizzy Gillespie caught a lot of flak for simply seeming to be happy while he played his famous bent-bell trumpet. (In his autobiography, Miles Davis railed against both musicians for their supposed Uncle Tomisms while praising their enormous and influential talents.) “Dizzy: The Man and the Music” is a tribute to the man who, along with Charlie Parker, created and popularized bebop. George Mason University Jazz Ensemble, John Lee, and Vaughn Nark are among those paying homage at 8 p.m. at the George Mason University Center for the Arts, 4400 University Dr., Fairfax. $19-30. (703) 993-8888. (CP)