OLLI Orchestra, Nevada County’s community orchestra, performs Haydn’s Symphony No. 104 “London” on Friday, May 17. Works by Mozart, Schumann and Americans Samuel Barber and Leroy Anderson are also on the program. Osher Lifelong Learning Institute (OLLI) adopted the group in 2005. Conductor Steve Miller helps audiences understand the music. He teaches at Sierra College and has led OLLI for 15 years. The talented musicians are volunteers who “love the beauty of sharing music with the community.” OLLI Orchestra performs at Sierra College, 250 Sierra College Dr., Grass Valley. The May 17 concert begins at 7:30 p.m. and runs 90 minutes with no intermission. Tickets aren’t required. Parking is also free and there will be signs at the college entrance pointing to the Multipurpose Room N12. Visit www.olliorchestra.org for more details.