All canine insurgency and dog park community groups should examine the organization power of Facebook DogBook.
As you know the insurgency had a partial victory last fall over the urgent need of a fenced yard at Allen Gardens (downtown Toronto, Canada). A fenced yard was created late fall, and has been used heavily by the local pack even in its unfinished shape. I say partial victory because it remains to be seen the health impacts of the 60% granite sand design, and the repercussions in terms of leash enforcement in the rest of the park which would likely be counter to the insurgency's dog park policy position.
And why was it needed? Dogbook stats currently puts the number of dogs withing a 2.5 k distance of the park at over 2700.