There are 2 Nicksilver recordings from the same date:
Capitol Theatre, Passaic, NJ, October 8, 1983 (8pm show, short set opening for Hot Tuna)
Folk City, New York, NY, October 8, 1983
Details at http://www.michaelcross.me.uk/jc/gc-det.htm#ct83
Google Maps tells me that Gerdee's Folk City, NYC (which was at 11 West 4th Street, not far from Washington Square Park), is sort-of 'just across the river' from Passaic, NJ.
So it COULD be feasible that they did play both shows in one evening. They'd have to tear down (unless they used some of HT's gear), pack up, drive, then set up again at the other end.
Nicksilver (aka Thunder & Lightning, Gravenites-Cipollina Band)
Capitol Theatre
Passaic, NJ
1983-10-08
analog sbd
1. MC intro > Blues In The Bottle 4:07
2. Small Walk-in Box 9:49
3. Trust Me # 4:49
4. Do I Move You? * 5:40
5. Pride Of Man > chat 4:47
Total 29:14
Band:
Nick Gravenites - Vocals, Guitar
John Cipollina - Vocals, Guitar
Al Staheley - Bass, Vocals #
Gregg Elmore - Drums
Merl Saunders - Vocals *, Keyboards
Note:
opening for Hot Tuna
The included ticket scan is for the 11:00 PM late show. It is thought that Nicksilver only opened in the early 8:00 PM show.
NB John Cipollina recordings can be found in various collections within the Live Music Archive ( https://archive.org/details/etree ):
John Cipollina - 325 - http://www.archive.org/details/JohnCipollina
Dinosaurs - 114 - http://www.archive.org/details/Dinosaurs
QMS - 31 - https://archive.org/details/QuicksilverMessengerServiceMusic
Zero - 621 (with Cipollina from 1984 to July 1988) - http://www.archive.org/details/Zero
Images for all shows as well as full size images for this show.
Images for this show: