My wife and I attend a church where no one will fess up to having musical talent. Our first Sunday, we sat in the third row, and when we started singing the first hymn, we seriously thought the rest of the congregation decided to sneak out and leave us singing by ourselves. When I turned around, I saw all the seats still full and no one singing.
Every year, we have a Christmas program. It usually involves dinner and a few musical numbers. As you can guess, music options are a little sparce. Someone found out my wife and I can sing (although my wife is MUCH better than I am) and that we can't say no.
Last year, either one or both of us were involved in every single song. This year is the same story (except for one song that will be performed by all the kids). Our main concern is that people are going to think we volunteered for this. I think I would rather watch every episode of Barney the dinosaur or deal with the flu every day in the month of December than sing this much in public.
Thankfully, I married a girl who oozes musical talent. As a result, she can cover me up pretty well and no one will listen to me too closely. I also have to keep reminding myself that everyone listening is just grateful it's not them up on stage.