I didn't go as I've seen this coverband version a few times and they are simply going through the motions. Credit to them - they still put on a better performance than most artists half their age.
Interesting observation. On the left hand side on stage behind Simmons position there was a black shower curtain type set up like a one person privacy screen.
From the front on position you had no idea what was behind it, but from my seated side on vantage point you could see there was a seat behind it and nothing else.
It was quite funny to watch Simmons quickly ducking behind the screen at regular intervals throughout the show for a sit down and quick kip.
Or maybe it was a grandpa power nap.