The Happy Valley Guitar Orchestra puts on their signature event of the season; two concerts over two nights at Northampton’s premier venue for the arts, the newly opened 33 Hawley St. Presented by the Northampton Center for the Arts, the Valley’s finest avant-garde community music ensemble will perform music by James Brown, Antonio Carlos Jobim, Bela Bartok, Felix Mendelssohn, Heitor Villa-Lobos and surf guitar classics such as “Pipeline.”