I might add, that our view of the past is also somewhat tidied up. The below contemporary drawing of Liszt playing would indicate that the audience was not particularly quiet, well behaved or oblivious to other attractions present.
What place does "classical" music, and more precisely, the performance of classical have in your life and in your circle of friends, off the stage?
why does the performance of classical music seemingly belong on stage in a formal setting, and no where in an informal setting?
In informal settings, though, you cannot blame anyone for continuing what they were doing.