The Gateway Arch grounds cover 192 acres, making it difficult for the Park Rangers to be visible and present at all times. To help expand their presence, the National Park Service instituted a Bark Ranger program where trained volunteers and their canine companions can walk the grounds provide service and observations when the official Rangers are unavailable. At the Arch, Bark Rangers monitor the ground and answer questions for tourists. At Glacier National Park, the Bark Rangers keep visitors away from the goats!
Apparently, many downtown residents routinely walk their dogs throughout the park, and this is an ingenious way to capitalize on their willingness to be a resource. For the price of a bandana and t-shirt, the Park Service unleashed dedicated fans to help them. Who is using your service already that you could more formally deploy to assist your organization?