If they were not joined at the hip, they were certainly joined at the piano bench. A special concert salutes the Canadian jazz giants Oliver Jones (now retired) and his late friend and mentor Oscar Peterson. Piano luminaries scheduled to perform include Monty Alexander, D.D. Jackson, Robi Botos and Marc Cary, in a program of such melodious things as The Canadiana Suite, Peterson's hard-swinging homage to his home country. Dec. 9, at Living Arts Centre, Mississauga.