I know there are a few in the Austin area, and this is mainly addressed to them because they're likely closest. If you'd like to take a day-trip away from Austin this weekend (or where ever you live if you're able/inclined to travel to Bryan-College Station) and be entertained with holiday music from multiple choirs on a Sunday afternoon, I can hook you up. My college chorus and it's two sister choirs will be putting on a holiday concert at 3pm, and I can promise that you'll enjoy at least MY choir's contribution (I haven't heard the other two). Each choir will have 5 or 6 songs, and the transitions between will be filled with the music of acapella sub-groups each choir puts together. I don't want to give out concert location details in the open blog, so if you have some interest, PM me! Tickets are $7 the day of.