All these First Class threads remind me of the first time my wife and I travelled First Class. We were going to London for a week-end break, and it was the first time I had arranged it all myself on this new fangled internet thing (Late 90's or thereabouts), previously I'd organised trips through a travel agent.
I'd looked up the train fares from Thornaby to Kings Cross, which came up as something in the order of £90 each return (standard). Whilst checking the page an advert came with, "Darlington to Kings Cross from £59 return", so I changed the search criteria to DAR to KGX. This came up with fares from £69+ each, but with a "two singles might be cheaper" option. On checking this option the cheapest fares came back as an advance 1st single £22.50 each, provided we were willing to travel on the 9.59 out of DAR, and return on the 20.00 out of KGX. A slight change to our intended plans, but for the price it was worth it, total cost £90. This was a time when 1st advances had about 4 different levels, and something like 14-16 different price level altogether on a DAR-KGX fare.
Having never travelled "First" before and not wishing to look out of place, on the day, I dressed up accordingly, Jacket and Tie etc... Back then a 1st advance allowed use of the GNER first class lounges, which was another bonus. So naturally we made use it. All very civilised. When the time came to make our way along the platform, we boarded the same carriage as a the former leader of the Conservative party (as he was then). We were just so in awe of it all, and then to get served free drinks (Tea & Coffee) and biscuits, a couple of plebs mixing with the elite, we were living the dream

.
At the time not, knowing how tickets were priced, we assumed standard was full'ish, and First was empty, hence why we got cheap tickets. This "theory" was backed up by the fact that there were only around 16-20 people in our carriage.
We arrived a KGX for our return journey in plenty of time, again suitably dressed in Jacket and tie etc., expecting a similar standard of clientele as our outward journey, we made our way to the First class lounge. You can imagine our surprise to find it full of Newcastle football supporter (Newcastle had been playing Arsenal in the live Sunday afternoon Sky match), to say "some" were the worse for wear after leaving the First Class lounge would be an understatement. They weren't drinking the free Tea & Coffee that's for sure. They like us must have found the cheapest tickets when booking were the 1st Advances. The journey back was "trying" for the staff on-board, and not the greatest of experiences in comparison to the outward journey, but it didn't put us off going first class on future trips (subject to price, of course).
A few months later GNER stopped access to the lounges, for first advance ticket holders. I always wondered if it was because of what happened that Sunday evening.