I have been regularly booked at The Cork singers club   and enjoy doing the occassional completely unaccompanied singing gig.It is not a problem for me at all. I was asked to give examples of stylistic exclusion. I did so, I mentioned CCE, and unaccompanied singers clubs.
My point is that it is an example of stylistic exclusion.
I am not trying to impose anything on anyones culture, that is ridiculous, I am hardly in a position to do so., neither is it my desire to do so,
it does not affect me or my livelihood as I am able to do unaccompanied singing, furthermore I enjoy doing an evening of unaccompanied singing.I would not have returned to the Cork singers club five times if did not enjoy singing there and listening to the other singers, I also turned up to see Ken Wilson do a gig there which was a great gig. and the general standard of singing was high in the club, it was a smashing evening.
   It does affect other performers who do rely upon accompaniment., it means they either have to perform unaccompanied or are excluded from doing a gig,these are the unaccompanied singers clubs rules they are not my opinion but a fact.
Every club organiser has that right to run a club the way they want, I do not have any problem with that and I am personally quite happy to do an evening of unaccompanied singing but it does not alter the fact that by its very nature it excludes accompaniment,and therefore is stylistically exclusive, that is a fact.