I did have a strange couple of Summers when I played or worked at various festivals around the south of England.
One day, at a Brighton festival, I think, I was greeted in a beer tent by a group of friendly drunks who mistook me for someone they knew.
A brief conversation assured them that I wasn't the friend in question but they all stood agog and went very quiet, only muttering about how I was the spit of this friend and I must be a twin.
So taken with this likeness they offered to buy me a drink and enjoyed a pleasant half hour while more of their friends arrived, instantly mistook me for the 'other' friend while those 'in the know'

stood around p*ssing themselves laughing.
A most enjoyable encounter that was then repeated with the same group at four other festivals over the years!