Church choir would tour the neighborhood sometime in December, normally on a really really cold night and sing a variety of songs at the homes of the elderly, usually. The selection process for identifying them wasn't necessarily a closely-held secret but then most of the choir probably didn't care unless they had a specific person they would want to entertain.
Goldy the Gopher was never one of them. See what a University of Minnesota flash mob can do. Click the full-screen icon for your best view, and use a 22" monitor or larger. If you are receiving this posting by email, click the link to go to the blog site.