I think this was taken at the New York Filmmakers Cinematheque during the Up-Tight shows Feb 1966.
Checked out some of the Adam Richie pictures and you will see the similarity of the place Moe´s drum kit is placed
Also, Moe's seated in a wooden folding chair in the referenced photo, where I don't make out her seat in the Ritchie set at all. I appreciate your trying, but I'm not convinced that we have a match.
The chair that the amp on the right of the picture is sitting on looks like the chair that has an amp sitting on it in some photos from the Cinematheque. This one, for example:-
I think the unrecognized pic looks like it could have been taken while they were setting up, rather than during a performance, so outfits could have been changed and furniture moved between it and the other photos.
Sheila Klein wrote: ↑20 Oct 2020 22:09
Thanks, but that's a different kind of chair. Also, I don't see any reason to assume the photo is of anything other than the official performance.
To be clear, I'm talking about the chair that the amp is on in both pictures, not the chair that Moe is sitting on in the unrecognized pic, which is indeed a different kind of chair. (Although I also think the shadow behind the drum in the pic I linked to could well be the shadow of Moe's chair.)
The reasons I speculated that it was a picture prior to the performance are that Lou is sitting on one of the amps, and Moe is also sitting and looks like she could be setting up the drum.
I'm not sure whether Lou actually is wearing a different outfit anyway, apart from shades on/off.
I see similarities and differences. Not sure if it helps, but here's a clearer picture. There also seems to be a copyright mark on it, which may possibly be useful. Topham/Onion Press