My brothers restaurant in Phoenix had live music. WE had one guy, a multi-instrumental bluegrass/appellation music wonder. There were strict instructions,NO TALKING WHILE DURING THE PERFORMANCE. He would shine the spotlight on the patrons and ask what they are discussing or why were they ruining the show for everyone else?, as the rest of the crowd stared at them. Those type of people won. they pay good money to enter and for food and expect background music, not a performance. Now, you have a performer playing for 30 people where they could easily play recorded music, it almost doesn't matter that they are there. Music is not where it is at for most folks under 35. They love it, as background music, not the main entertainment. And now, what going to happen?What happened are a couple of things.
First, people probably got tired of losing hearing from those loud shows. I know I have. I never go to hear live music without a pair of Hearos.
Second, music has become, for many, a soundtrack for their social lives. While plenty of folks still go to shows to dance and mostly listen, there appears to be a growing number of folks who want to be able to talk to those around them while the music is playing.
Both of these situations call for lower volumes.