The restaurant at a hotel in the Scottish Borders. The chairs were wooden, with upholstered seats (like this picture).
I think that, when these are upholstered, it starts with webbing straps that support the padding and upholstery fabric - well, it was clearly years since these chairs had been re-upholstered. There was NO support under the padding, so when I sat on the chair, my bum sank down so far that the front of the frame was digging into the back of my thighs.
I could only sit comfortably for a few minutes - I was hurting before the starters arrived. Dh swapped chairs with me, in case it was just one chair. It wasn’t. The staff brought a chair from another table - still just as bad.
We were there for two days, dinner, bed and breakfast - so four meals on the Torture Chair. I asked if I could sit at a different table - that was a complete No No - I have no idea why.
I filled in their customer survey when I got home, and told them how uncomfortable I had been, and how it would put me off ever going to that hotel again, and they didn’t even bother to reply.