The first day of Doable Cities included a neighborhood walkability tour. Photos: Emily Munroe. Innovation can be a lonely task. But not this week in Chicago, where more than 150 civic innovators are gathering for the “8-80 Cities Forum: The Doable City” through Wednesday. “Doable doesn’t mean easy. It means possible,” said urban expert Gil Penalosa, executive director of 8-80 Cities. Participants, including artists, city planners, community activists, community foundation executives, mayors, parks officials, philanthropists and traffic engineers, are meeting to exchange practical experiences on what works—and doesn’t—to make cities more livable. But during the opening session Monday afternoon, there was a palpable sense of building a movement, by connecting those who are trying to re-center cities around human needs—including the need to engage in various ways.