Franz Welser-Möst conducts the Cleveland Orchestra tonight at Severance Hall as it takes on Beethoven's Overture: Coriolan and Symphony No. 5. The orchestra will also play Beethoven's Symphony No. 8, a light-hearted piece that doesn't suggest how complicated the composer's life was at the time he wrote it. The concert takes place at 7:30. An hour before the concert, Cleveland Orchestra Music Study Groups' administrator and lecturer Rose Breckenridge gives the pre-concert talk, "Beethoven: Buttoned and Unbuttoned!" Consult the orchestra website for ticket prices. The concert repeats tomorrow morning at 11 at Severance Hall. (Niesel)