One specific fic that I think was on Archive Of Our Own-
Klaine, set in the future. Blaine gets a job teaching a church choir (leading a choir?) and Kurt doesn't agree with this at all. Blaine takes the job and it's a very progressive and accepting church. Further in, Kurt comes around at least a little bit, and two or three of the choir ladies come around for a holiday - maybe Thanksgiving or Christmas - with Kurt's family at Blaine and Kurt's house. I think two of the ladies are lesbian partners, and I'm fairly sure there's a drama (car accident, maybe?) around the holiday. All ends up okay, of course.
Mods, for some reason I can't remove that unanswered tag.