The purpose of a church choir is to sing the music of the church to which it is attached. When people join they expect to sing that music - not, for instance, Irish folk songs. The limitations are part of the deal. If they want to sing Irish folk songs as well then they can join, or set up, another choir that specialises in that. If you join an Anglican church choir you can expect to spend most of your time singing the characteristic Anglican repertoire - Tallis, Byrd, Gibbons, Purcell, Blow, S S Wesley, Goss, Walmisley, Stainer, Elgar, Vaughan Williams, Howells and probably something unpleasant and difficult to sing, by the current resident organist who fancies himself as another Bach. The main services being Matins and Evensong, an Anglican chorister will have to master the technique of Anglican chant. Put that all together in a large vaulted stone building with timber choir stalls and an organ with a solid diapason and you have the authentic Anglican sound which you can hear at a c...