Strange. This is the information I have from
http://www.flickr.com/photos/gibcurry/2219667134/:
Sonic Youth set list
8/13/85
This show was at the VFW hall
band line-up:
Sonic Youth
Stickdog
Killdozer (pretty sure)
there was a fourth band... I can't remember who they were. I know the date of the show because the flip side of this set list is the fourth bands set list and they happened to write the date on the list.
On a slightly unrelated note, have you seen this, Chris?
http://malarky.udel.edu/~keith/bands/sonicyouth.htm