Why do you think such participatory entertainment has been largely superseded in western culture by such passive experiences as watching television, attending a concert, or viewing a movie?

Music is a democratic amusement. In sports, there are spectators and athletes. In music, there are performers and listeners. 

I in person believe that the hall is one amongst the few places within the Western musical culture that any culture still exists in the slightest degree. I might agree that there are musical issues within the West.
In music, you're either an entertainer or an observer.
By default, the entertainer is democratic whereas the observer is not. though the observer ought to be actively listening, that takes mental effort and will even be thought of democratic considering the depth of musical ideas and orchestration several avant-garde composers have left the USA thereupon are habitually vie in Western music halls.

That is true. hope it ! : )

They are not affected because the paint drys with the plaster on the wall, effectively making the fresco part of the wall.