Sleep City

China: Parents of university freshmen down for an afternoon nap. China Daily/Reuters

An app-connected wrist band called UP tracks a wearer's sleep, diet, and activity, among other things. Data collected from wearers around the world (more than 5,000 in each location listed) give an interesting portrait of the collective habits of certain cities' residents ~ a portrait, then, of the city itself. For example, of the cities studied, Tokyo sleeps the least and Melbourne the most (story, interactive graph): https://jawbone.com/blog/jawbone-up-data-by-city/#newyork