All the people clamoring to get into Broadway shows like "Wicked" and "The Book of Mormon" – or museum shows like the Rain Room at MoMa – are apparently the exception, rather than the rule. That's the conclusion of a new survey of public participation released last week by the National Endowment for the Arts. It shows an overall decline in arts consumption by Americans, with a particular drop-off in museum and theater attendance. There were smaller dips in classical music and ballet audiences too. But it wasn't all gloom and doom: Audiences are growing more racially and ethnically diverse.  And there are hints that technology is playing a larger role in how we consume culture.