Being an ISOMATA [Idyllwild School of Music and Theater Arts, now Idyllwild Arts] alumnus of the 1960s, I can say audiences knew better than to clap between movements of a single work.
The administration and teachers should immediately impart this knowledge to their students and at the very least note on future programs, “Please refrain from clapping between movement.”
Speaking as a past professionally violinist, having a prestigious string quartet play at Idyllwild Arts is something we should hope to repeat. Therefore, let’s not incur their wrath unnecessarily.
Also since the St. Petersburg Quartet gave master classes for an entire week, the Town Crier should have had an illustrative display ad running if other advertising options were not available because of time constraints.