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Basically, the idea of smalltalk is to get to know one another in a way that's not too personal for the casual acquaintances you are at that point. So you want to ask questions that can't be answered with just a word or two but ones that elicit replies that tell a little about themselves.

If you could go anywhere in the world for a week, where would you go and what would you do while you were there?

World-altering question: Is a hamburger a sandwich? How about a hot dog?

Pretend you're so rich you never have to work at a job of any kind. What would you do to fill your time?

What's something you used to do when you were a kid that you wish you could still do now?

If you were going to be snowed in at a cabin for three months, with electricity but without outside communication, what books and DVDs would you want to have with you?