We had 4 musicians playing cello to do music while our guests were arriving, for pre-dinner drinks and for the ceremony itself. As our "exit" song as we walked out of the service back up the aisle, they played It must be Love by Madness (hubby liked ska way back then and we're that kind of age.
We'd liked it when the cellists demo'ed it to us as it was kind of familiar but it takes you a few moments to realise what it is as it sounds different on cello.
Anyway, as we walk out, we see people look puzzled for a moment as they try to place the tune. One of hubby's cousins, shouts out triumphantly - and loudly - when he guesses it - "it's Madness!"
At which point his pensioner dad stood next to him, who has clearly never heard of Madness tells him to be quiet and have some respect, that marriages are a serious business and if he doesn't like it he should keep it to himself! It took a bit of explaining before he understood his son wasn't being phenomenally rude! We couldn't stop laughing.