Practice African Noel, 1812, Coventry Carol, and We Wish You A Merry Christmas. On African Noel, try to play along with this video (ignoring the bizarre percussion parts) so you get a feel for how the tune goes and how to groove with it. In particular, play out during those mini solos we have!
Here’s that video of African Noel again: https://www.youtube.com/watch?v=2gVXCKahuE4