http://www.graypanthers.orgLook at their front page, Their politics are consistent with the politics at DU.
They are an intergenerational organization, which means that we could all join.
Intergenerational Activist for Social Change
The Gray Panthers is a national organization of intergenerational activists dedicated to social change. We are age and youth in action. For almost thirty years, Gray Panthers have worked to make America a better place to live for the young, the old, and everyone-in-between. Taking on our society's toughest problems — peace, health care, jobs, and housing — Gray Panthers have been effective in creating change. Whether at the local, state or federal level, Gray Panthers fight to change laws and attitudes for social justice. Founded in 1970 by social activist Maggie Kuhn, Gray Panthers believe that all Americans should benefit from our country's abundance. Today Panthers are active in more than 50 local "Networks" attacking problems from an intergenerational perspective.
I'm joining and I am 35. And they don't ask you for money either, If you want to donate cash then that's your business.