Here's what happened in Cambridge England:
"The researchers put simple voting machines in local shops, asking questions about the neighborhood while people waited in line to buy coffee or groceries. Every two days, they gathered the votes, and sketched out the results on the sidewalk in front of each store in chalk. “By revealing the data on the pavement, we managed to make the visualization eye-catching: people would stop and try to figure out what was shown,” Koeman explains.
Since the researchers wanted to reach as many people as possible--including people who might not have come to a community meeting or visited a website online--the sidewalk was the ideal medium. As people stopped to look, they also started talking."
You can bring people together around issues affecting the community and start the conversations about how they might be improved by associating it with something that they do everyday like purchasing and that involves the people who drive the local economy.