§ 215. Alcoves. No part of any room shall be enclosed or subdivided,
wholly or in part, by a curtain, portiere, fixed or movable partition or
other contrivance or device unless each such enclosure or subdivision
shall contain a separate window conforming to the provisions of section
thirty for rooms in multiple dwellings erected after April eighteenth,
nineteen hundred twenty-nine, and have a clear floor area of at least
seventy square feet.