France. Ile-de-France region. Paris. 13th arrondissement. Dunois theater, 108 rue du Chevaleret. From left to right : French jazz musicians Michel PORTAL (clarinets, saxophones, bandoneon) and Claude BARTHELEMY (guitar, direction). Work sessions for the preparation of the concert "creation MICHEL PORTAL / ONJ" which will be played on Friday October 19th at the Music Festival "Metissages" in Lille. Thursday, September 20th 1990.