As a potential employee, I am just not going to do this. Nor am I going to complete puzzles (and I LIKE puzzles) or dance around in front of a whiteboard.
What I would be willing to do is work as a well paid contractor for 1-3 months to make sure that we are a good fit for each other. I'm not sure how anything other than actually working together could suffice.
I am fortunate enough not be concerned about immediate benefits like medical due to my wife's employment--I recognize that this might not be a good option for everyone.