CONCERT Alexey Aigi and 4'33 . "16 tons" , 20.00. Innokenty Ivanov (vibraphone) and the band. Club Igor Butman , 20.30. CLASSIC Great instrumental concert . V.-A. Mozart, M. Bruch, D. Shostakovich. Soloist A. Baeva (violin), A. Knyazev (cello). GASO of Russia E.F. Svetlanova p/u M. Gorenstein. Conductor A. Sladkovsky. Concert hall named after Tchaikovsky , 19.00. NFOR . S. Prokofiev, P.I. Tchaikovsky. Soloist A. Gavrilyuk (piano). Conductor V. Spivakov. House music , 19.00.