Young and old voices combine for a commanding sound that fills the room during a recent Thursday night rehearsal. Singers stand for the last piece and sway ? mostly in unison ? during the chorus. After the last note is sung, chairs are pushed back and tables are soon crowded with beer bottles and plates of sausage and Limburger cheese. Meet the Madison Maennerchor, the city?s German men?s choir, which celebrates its 160th anniversary this year.