If heâd only played on and cowritten âGreen Onions,â keyboardist Booker T. Jones still would be a legend, as thatâs one of the few songs that can be classified as perfect. Obviously, Jones has done tons of tremendous work since that 1962 smash, both with Stax house band the M.G.s and solo. The 68-year-old has cut three albums in the last four years, all with more spry, edgy funk than youâd expect from a sexagenarian. Heâll be supporting 2013âs Sound the Alarm tonight. (Jazz Alley, 2033 Sixth Ave, jazzalley.com, 7:30 pm, $32.50, all ages, June 27â30)