Sent to me by Charles Holzhauer,
from a show on 5th December 1976 at Todd Barkan's Keystone Korner
in San Francisco. Featuring (as you can see) a Van Vliet sketch.

Charles wrote about this evening:
My friend Paul suggested
that I go to an Italian cafe down the street and order a "two
day espresso" (the Keystone was in Italian North Beach). I
did so, and was soon bouncing off the walls.
I knew the bartender
at the Keystone, who was sometimes able to get me in free on the
guest list, and I could hang around after shows. This I did, and
helped Denny Walley load his equipment into the truck. Fee Waybill
came by to play the Tubes' then-new version of "My Head Is
My Only House Unless It Rains" for Don. Don was sitting in
the empty audience seats with Waybill and was talking to his wife
who was on the stage. After helping Denny, I stood in the doorway
to the left rear of the stage (behind Jan, in Don's line of sight),
listening to "..House..". I was swingings and swaying
until Don suddenly shouted at me, "Don't tell ME how to keep
time! You gotta do it in 4/4! Why don't you sit down and relax!"
Chastened, I did so. I think my motion disrupted Don's train of
thought when he was trying to talk to Jan.