When I started to compose my post, I’d forgotten about ‘Corner Bar’. I was about to post it when I remembered it. So I checked it’s purpose, found it to be (nearly) equivalent to my proposal, but populated by any number of posts that didn’t really belong! So I continued with my post and added the “Whereas” that addresses the failings of ‘Corner Bar’ for my purpose.
I had a particular problem in mind, which I have subsequently posted in ‘Corner Bar’ (there being no more appropriate place for it) which you can see at:
It also serves, I think, as an example of the sort of post I envision in ‘Off Topic.’