This is the simplest and funest tip ever!
Dancing for some conjures images of being awkward or embarrassed but let's put it into perspective.
Think about it, your friend has cancer. If it doesn't go well,
YOUR FRIEND MIGHT DIE!
So being embarrassed about your perceived lack of dancing skills is really the least of your concerns!
Let go of your fear. Let go of your ego. Crank up the tunes and just dance!