This document discusses tactical urbanism and the diversity of useful public spaces. It provides examples of temporary public spaces created for meeting, sheltering, and dining in cities like New York City, Los Angeles, and locations in Portugal and Brazil. The examples show how pop-up parks, cafes, and other spaces can provide benefits to urban residents and visitors on both short and long term bases. It quotes Enrique Peñalosa saying that humans need to walk to be happy, similarly to how other animals need their natural movements for happiness.