Mill Valley, CA’s Sweewater Music Hall will host a free Christmas Eve show tomorrow. The brunch performance will boast Acoustically Speaking featuring Kat Walkerson and Mik Bondy from The Garcia Project. The duo promise “original, soulful acoustic arrangements of your favorite Grateful Dead, Jerry Garcia Band and more.” Walkerson and Bondy have performed with Grateful Dead family members Melvin Seals, David Gans and Tom Constanten over the years.