Humour

You are a bartender, working at a bar on Zenefar, a planet in the Zeta-2 cluster millions of light years away from earth. You have found an ancient text talking about the 4 humours, sanguine, phlegmatic, choleric and melancholic and how every person in the universe can be classified into one of – or a combination of these humours. You must have conversations with your customers to find out what humour they belong to and then serve them drinks accordingly.