The Baroness Pannonica de Koenigswarter was a European aristocrat with a passion for jazz. Charlie Parker famously died in her Fifth Avenue apartment. She was often seen driving jazz musicians to shows in her Rolls-Royce. Tonight’s show, which was organized by Wayne Horvitz and Tim Kennedy, features four Seattle pianists performing music that was composed for the baroness by jazz giants like Sonny Clark, Horace Silver, and Thelonious Monk. (The Royal Room, 5000 Rainier Ave S, theroyalroomseattle.com, 8 pm, $7 adv/$10 DOS, all ages)