Founding Dirty Dozen Brass Band sousaphone player Kirk Joseph will once again sub for George Porter Jr. in 7 Walkers this December. Joseph will supply the low parts when the group performs at New York’s Sullivan Hall at both 8 PM and 11:59 PM on December 30. The rest of the group’s lineup features Bill Kreutzmann, Papa Mali and Matt Hubbard. As of press time, Porter’s only confirmed show that week is a December 26 appearance at New Orleans’ Howlin’ Wolf for his 64th birthday but the bassist may confirm a date with The Meters, Runnin Pardners, the Funky Meters or another project on December 30.