it seems that today here in the US most of the singing is done by those on the stage whether in church or in stadiums...
When I was living overseas, I remember quite clearly. They ran a special "sing-a-long" edition of the movie "Sound of Music" in London's West End. Everyone got into it...singing coming from all directions around us. Like being smack in the middle of a choral group.
I went to see the same movie here in the States, and only eight people showed up. And.....not one of them sang the captioned words!
I also remember playing pubs all around London and working men's clubs in the North. Not a single person did NOT sing.