Being serious, I would put much of the blame on the marketing campaign (aside from very mixed reviews.) And by the way, there were enough fantastic pull quotes from some of the major critics that could have been used better in marketing also, but that's not my major point.
This is a big, SEXY show! Lots of pretty girls for straight guys to look at. But you'd never know it from the marketing, which for the most part featured Nick Cordero and the gangsters. It all looked very dark, but the show isn't dark at all, it's very funny.
Also, they couldn't decide whether or not to feature Woody (and even his movies are generally not big box office hits), Stro (and who other than theater geeks buy tickets based on the director) or Zach Braff, who I agree does not sell tickets either.
Woody Allen films are not "big" films. I love many of them, but they are subtle in many ways. They are usually short and often have a darkness to them.
So somewhere, the pitch that this is a big, splashy, sexy, funny show got lost. At least that's how it seemed to me.
CZJ at opening night party for A Little Night Music, Dec 13, 2009.