"Tri-City Chorus is a member of Border Lakes Region #2 of Sweet Adelines International (SAI), a non-profit worldwide ladies barbershop organization that performs four-part harmony music. Barbershop music is one of a few forms of music native to the United States. State Theatre, 913 Washington Ave., Bay City. Starts at 3 pm. $15 general admission. Phone 989-892-2660.