First of all, I know how important casual Fridays are. We didn't have them when I worked outside the home and I used to LIVE for any time we got to dress down. There was nothing like being able to just throw on a pair of jeans and not fuss about what to wear the next day.
The Tree-Trimming Troup (I was trying to think of something with all T's)
Holiday Hustlers (LOL... may be a bit un PC for the work environment, though )
OK I'm horrible at this.