The band Yes are still going, despite the loss of the only surviving founder member Chris Squire. They played in Sheffield three times in 1969, 24 February, 12 September 1969 and 21 December – part of the 200 gigs they performed that year. Amazingly, recordings exist of two of these gigs, one listed as the “Kingston Hotel”, but I suspect both are at the Penthouse. I doubt the photo is from there, but you never know.
Have a listen to the tracks on youtube, they display an astonishing maturity and musical technique, oh to have been there