I have pesonal
I have personal experience with this, as I started an accordion club with a friend (I posted about it before) which is still going strong after I moved away a couple years ago. My friend was a traditionalist, as well as "music director," while I was more "social director." (We started in my other friend's bar.) It is important to make everyone welcome and have some say in choosing the music. I do know of at least one person who left because of this.Well, my take is that accordion clubs are a reflection of:
1. the owner
2. the participants
So in a well organized club, I can really see traditionalists playing with non-traditionalists and everyone having a good time. I am sure we all went to some kind of show or play or opera and did not enjoy each and every piece and still somehow managed to have a good time!
It's when #1 and #2 are so focused on a tiny segment that they hurt themselves. In that case, time to make your own club that (if you are smart) does not only what you want but what "others" want and brings in all the others.
Worst case scenario, you have two clubs with wildly varied tastes and to each their own.