Computer services, namely, creating an on-line community for registered users to choose existing spaces in a city, such as buildings and empty lots, and prototype what improvements could be made to how such spaces are presently used, in a digital and social environment; Providing an online non-downloadable Internet-based system application featuring technology enabling users to choose existing spaces in a city, such as buildings and empty lots, and prototype what improvements could be made to how such spaces are presently used in a digital and social environment