Put the students in groups of 2-3-4. Have them pick 4 famous people, dead or alive that they'd like to invite to a party they are having. Then, they have to say the reason why they're inviting them. I do an example like this:
Person: Michael Jackson
Reason? He can play some dance music for us. Also, I want to know why he got so much plastic surgery.
Give them a few minutes, depending on the level. Then, I get the student to pick 1 or 2 of the people, depending on the size of the class and tell the rest of the class their answer.
I've gotten an interesting array of answers and the students are quite interested to hear what the other groups have to say.