Ever since Mayor Michael Bloomberg announced the winner of the adApt NYC micro-housing design competition, it seems that everyone is talking about tiny apartments. In my reporting for Flavorwire, I found that New York isn’t the first city (nor the last) to build micro units. A Vancouver developer has built apartments so small that the bathroom is a closet-size alcove with frosted windows. In Boston, a designer proposes to save on space by making bathrooms and kitchens communal. Are these “dorms for grown-ups” just a fad, or a permanent part of the urban rental landscape?