There's another factor, by the way, one which has nothing to do with volume. I don't know if it explains the "many sessions" you spoke of, but my main reason for going to acoustic-only sessions and concerts is that I enjoy listening to acoustic sounds. Just as listening to birds singing outside my window is different from listening to human music, the sounds of acoustic instruments and voices is different from any sounds that come from loudspeakers.

I have nothing against electronic sounds per se. I listen to recorded music all day long, and I go out at night to dance to very loud bands where even the drum set is amplified. But acoustic music has a unique quality, and it's very pleasant to hear it once in a while, and we don't often get the chance.