Mostly successful day yesterday with the Men's shed group operating in a rather different room in the retirement village where we rent our premises. There's a small shop that caters for basic grocery, first aid, stationery, craft, snacks, tea/coffee, drinks and the like. Its shelving consisted mostly of bookcases screwed, nailed, bolted, glued and siliconed to walls, ceiling & each other at varying heights, mostly inaccessible to the volunteers who operate it for two hours each morning.
We've contracted to strip out the shelving, repair any surface damage prior to painting then fit out the new low-level shelving throughout the room.
We achieved the first aspects yesterday, removal & disposal of the old shelf units plus the repair of the walls. Today a painter goes in to do his stuff.
There were some noise complaints from self-appointed idiot residents (it was a high-noise environment involving much smashing apart of heavy bookcases -aka FUN). We simply asked if they'd like their shopping/social routine disrupted for one week or for two, that shut the intransigent of arsewipes up.
Assuming the painter does his jog today, we have the next three days to fit new shelving & rebuild the new service counter in a different location.

I'm claiming it was mostly successful because I may have overstressed my already-damaged lower back in the process. It was only the use of cold compresses that allowed any overnight sleep.