I was in one that passed out match books that declared 'Est. 1620'. I pointed to a very old ceramic backstop, and asked the waiter if it was made in 1620.
He looked at me indignantly and declared "Of course not. We totally remodeled in 1810".
Funny story. I was once in a British pub with some American friends. We were in a booth by the front windows and two of us needed a refill. I looked towards the bar, trying to get the bar tender’s attention, as it was crowded and loud in there.
I finally get him to see me and I throw him a hand signal with two fingers held up, so he can see that we need two refills. Next thing I know, the guy’s face turns angry and he moves to jump over the bar towards me.
Just then, the owner grabs him by the shirt tail and stops him. They have a couple of words and the bar tender calms right down.
When the owner brings our drinks he explains to me that holding up two fingers with the knuckles facing outward, is the British hand sign for FU.