Back in the late sixties and early seventies, if you lived in the New York area, you could wake up in the morning and decide which demonstration you wanted to attend on that day. You could help the environment, fight the war, support women's rights or other topics simply by picking up your phone and calling Dial a Demonstration. Then you would get information on upcoming demonstrations in the area. I guess today's equivalent is finding your local chapter of Indivisible, possibly on Facebook.
Editor's note: I could not find any links to Dial a Demonstration, with the exception of an earlier Mustache blog, on Google. Such a mainstay of life of that era appears to have been forgotten.