Authentic efforts to expand/diversify an audience look like this:
An orchestra is trying to bring in a younger audience. It's a common problem in the classical music game. So the conductor of the orchestra starts trying to figure out how to make that happen.
Stop right there.
Did you notice that I said the conductor got involved? Someone at the top of the organizational food chain. That makes a world of difference.
If the leaders of the organization don't embrace the efforts to expand/diversify the audience then the whole thing is a waste of time. A token effort. A bunch of BS.
Also, please note that I said embrace the effort. In real life terms that means devoting money, time and other resources to the effort.
Then this conductor listened to some of the insights offered by the audience he wanted to reach. In this case it was the idea that maybe young people (in this case defined as say 18-30) don't attend concerts because "they don't want to be seen with their parents."
Normally that's the sort of insight that gets quickly dismissed. Not because it's wrong, but because people don't want to hear it. Instead, this conductor had enough respect for the viewpoint to consider it.
Then, and this is the big one, the organization changed the programming. In this case they created "late night" classical music/dance parties that they hoped would better fit the lifestyle of the audience they were looking for. Some of these concerts start at 10pm and go on (in different forms) until 4am.
Did I mention that this conductor is 75 years old? Did I mention that this conductor is a respected leader in his field and therefore could have easily decided that he (and his organization) didn't need to change?
So to sum up:
1. Someone decided audience expansion/diversity was important.
2. They listed to what the desired audience was saying.
3. They changed.
In this case, the "dance party" worked. They sold well and people enjoyed them. But I'm also willing to bet that if the effort failed, they would keep trying until they found something that worked.
This isn't rocket science. Click this link to learn more about the orchestra's efforts.