With a Model A out front, and a 20s/30s band in the back, it was quite a party.
Nico and I didn't look too ridiculous as a few other people also dressed up.
Either the turnout was surprisingly good, or Kiwis drink a whole lot. (It is not evident from the picture, but that is a very big box.)
And to answer your question, the most white russians I have ever made at a time while wearing a top hat is: 10