On a chilly Saturday evening in a suburb just outside Washington, D.C., a crowd of kids were furiously pedaling away on a dozen bikes bolted to the base of a 35-foot Christmas tree display. We were just minutes from Silver Spring’s annual tree-lighting ceremony at the downtown plaza, and some were seriously giving themselves a full workout.

Link: https://www.citylab.com/life/2017/11/christmas-tree-bikeshare-display-silver-spring-maryland/545726/