Maia Sparks
Maia was there, both as event planner and eventually as guest. She was wearing this (and would have invited Wyatt along -- up to you if he came, Jach!). :3 Though there was stuff that she did need to do ahead of time and just to make sure things ran smoothly throughout the night, she is very good at her job and things went without a hitch thanks to her planning and such, so she was able to split her focus pretty easily.
She probably nursed a glass or two of wine most of the early part of the evening, then kind of took part in a bit more after the auction and things relaxed a bit. It's a vineyard. When in Rome. But she would have been her usual social self, saying hi to everyone she knew, and spending most of her time around her faves. She also was very much there for the dancing.