The primary purpose of going out with your friends to the pub is social interaction. If the purpose was just to get drunk most efficiently, you'd sit at home alone and pour vodka down your gaping maw.
The purpose of talking to your friends is social interaction. If the purpose of being friends was to extract information in the most efficient manner possible, you'd replace them with Wikipedia.
If in some social interaction they ask such question I expect them to actually want to know the answer. If not the question should not be asked. The answer to question can lead discussion to some place.
The idea that you would consider your friend a buzzkill because they used IMDB is the type of nightmare fuel social anxiety is made of.
You don't think it'd be fun to hear everyone guess and then someone looks up the answer? Sounds like trivia to me.