Need a break from the onslaught of cheesy holiday muzak? May I suggest an afternoon of deliriously melodic Spanish, Italian and Russian compositions played by the 20 plus members of the Aurora Mandolin Orchestra. It’s a soaring all-string concert on guitars, mandolins, flutes, accordions and percussion. You will find them strumming happily Saturday December 9 at 2pm in the Koret Auditorium at the San Francisco Main Library. Free.