I always like to arrive prepared and be on the front line before the battle starts.
So midnight we hit the Gansevoort South http://www.gansevoortsouth.com/ roof bar.
We were the last to leave as they shut at 3am... then onto the RokBar http://www.rokbarmiami.com/ until way too late for someone of my age.
Welcome to Miami South Beach, no rest for the wicked ;-)