If you have read Evangelism for the Tongue-Tied, you know that I advocate a question that works all the time.
What are your spiritual beliefs?
But I may have a new favorite. Or at least, a close second. In this article, the author suggests a powerful ice-breaking question is:
What do you think happens when we die?
I like it a lot and his article breaks down the two types of responses he gets. Then you can keep asking more questions. I plan to put this question in my arsenal and ask it to one particular person that I have struggled to bring up the gospel with.
Read the whole article. And then pray that God will give you a chance to ask this question.