My wife is interested in joining a choir that sing anything from Gospel to Blues to Jazz.

Any ideas/recommendations appreciated

I play blues guitar - let me know if you hear anything.

We've got listings for over 37 choirs in Sheffield on our database. To see them visit the link in the sig below, then where it says
I want to find groups which are listed under the category (Please Select from the drop down list) select choirs.
Whilst some look quite traditional plenty seem to have a varied approach to music.
Hope this helps!

Dan