Several years ago my husband and I went camping near Chichester. Just down the road was a lovely old pub and at the end of each day, we would go there for dinner.
On about our third evening we went in and the place was packed with famous faces. Danny Devito was sitting up at the bar. Marilyn Monroe was chatting to Audrey Hepburn and Anthony Perkins (Psycho) who was serving drinks behind the bar with Bet Lynch, and multiple other 'faces' were in and around the pub.
We got the giggles - before we had even had a drink - and the more faces we recognised, the funnier we found it.
At one point, Danny Devito told us we looked like a fun couple, and invited us to a party at a big house down the road.
We left the pub after a couple of hours and after walking up the road for a while, the giggles wore off and we were left wondering if we'd somehow entered the Twilight Zone for a while.
We did actually see a big house across the fields, all lit up and with music playing, and were sooo tempted to go to the party.... but talked ourselves out of it.
We later tried to find out if there had been some sort of Lookalike Agency get together, which would have explained it, but never did get to the bottom of what we experienced. We often talk about it - and really regret not going to that party!