Maybe use them as bait to bring more people in, so you can raise more people's wages. An AARP-like organization such as the group Working Today, is a fine idea for the nonunion majority. It might even warm up more people to collective action. But this is work from which Labor should stay away. But don't ruin this with affirmative action.
Unions already have many women and minorities.
Just let more members vote directly for their top leaders, and it will produce more integrated leadership. It makes me cringe to see people, lamblike, go to the polls with no one, as in the old New Deal days, to articulate what their real interests are. Each was elected by the rank and file. And pull in the kids. Of course, you've already done this as well as anyone in the labor movement.