While channel surfing in recent days, I stumbled across a concert on the local PBS station. The concert, recorded live in New York, featured Straight No Chaser, an a capella group of ten men. Can't say I'd heard of the group. Maybe you haven't either. (The group's web site is here.)
I loved the concert. You might, too. The men perform a variety of songs, including some holiday favorites. The concert lasts about an hour (closer to 90 minutes, when you add in the "pledge drive" segments). Check out the TV listings in your area (the PBS link is here).
And if you need a teaser, check out the group's version of "The Twelve Days of Christmas" on YouTube. Here's a link. Enjoy! (Be prepared for surprises at the 1:25 and 2:18 marks!!)
Just hope you all know the likely origins of the group's name: legendary pianist Thelonious Monk. If you've never heard the song, or any of it's subsequent covers, I suggest taking a listen.