My husband proposed marriage to me on his knees in the mid-galley of a DC-10. He was a young policeman then and he was drop dead handsome. He was on duty at LGW and I was just a Purser with BCAL. Everyone in the crew coming back from LAX was in on the act except me. He was so afraid that I'd say "No" that he thought that I would not dare do that in front of witnesses. This was in 1985 - I married in 1986 - and I was drafted into BA when BCAL was bought out two years later.
This has nothing to do with Lounges and even less to do with BA so I expect that this will be shunted off to the dark side of FT before you can say "Compensation". Still - you may say What's Love Got To Do With This - Reader. I married him.