About 18/9 years ago, fresh out of J.W. org, I attended a lovely old church, just once to see what it was like, I guess built early 1800's, a vibrant Preacher, but I was dressed as I would have been for a J,W meeting, shirt, tie, trousers, jacket etc, polished shoes.
All the Congregation were in smart casual, the teen kids in their version, and the teens all sat together, even the preacher was smart casual, open neck shirt etc.
I felt distinctly over dressed. The atmos. was great, really fun and friendly, the Band that played Christian Rock was really good too.
The Church served an area that was only a small fraction of the vast Territory "served" by our K.H, so lots of alternative places for people to worship nearby. That Sunday morning our K.H would have been half empty, this Church was FULL !
J.W org needs to modernise big time, and attract people, or die from lack of funds. I hope the latter happens. And may Churches like the one I attended, prosper, and continue to provide what people want. People don't want an Authoritarian group to tell them how to dress, and to bore them to death.