■ 'Summer Sings - Beethoven and Haydn'
Audiences are invited to join choral singers from all over the Bay Area to sing Beethoven's Mass in C and the Haydn "Lord Nelson Mass" today (July 18) at 7:30 p.m. at Los Altos United Methodist Church, 655 Magdalena Ave., Los Altos. Admission is $7-15. For more information, visit Schola Cantorum.
■ Michael O'Neill Quartet & Sandra Aran
The Michael O'Neill Quartet featuring Sandra Aran performs today (July 18) at 6 p.m. as part of the free Jazz on Main series, Main and Broadway, Redwood City. For more information, visit Jazz on Main.