Island Sinfonia, the chamber music orchestra in the San Juans, presents a concert of light classical music. The orchestra, directed by conductor Jim Shaffer-Bauck, is composed of 25 instrumentalists, including student musicians and devoted adults. Island musicians are always invited to join. The program will include Suite in G Major by Bach, Slavonic Dance No. 6 by Dvorak, Overture Theodora by Handel, Waltz Fantasie by Glinka and several pieces featuring Sinfonia’s brass choir.