I have been in a couple of community choirs. The first, in Gateshead was very folk oriented and did a number of British folk songs, as well as world music. The second, in Yorkshire we did the occasional local folk songs, but the focus was more on world music, as well as "socialist songs", shapenote music, and some contemporary stuff (we did a cracking arrangement of Dancing Queen...). Thee is also a choir local to where I live now, which I plan to join when it becomes more convenient for me - they focus mainly on local traditional songs I think.