All White Affair

I have a Christmas Eve event to attend and it's an All White Affair. Breaking all the rules about white after Labour day blah blah blah. I'm at a loss on exactly what I should wear. This is not a formal event by any means. It's the night club scene. I put together a few looks I could go for. What do you think?
A.

B.

I of course may deviate from any of these basic looks but they represent the two options I'm going for.