The Grateful Dead - The Matrix, San Francisco, California, December 1, 1966 "Welcome to another evening of confusion and high-frequency stimulation, and Sucrets, cold beer on tap, lurid nightclub atmosphere, and more beatniks than you can count on the fingers of two hands." Over on Aquarium Drunkard this week , I scribbled some thoughts about a Grateful Dead Fillmore Auditorium 1966 tape , which…