This document describes the Smart Street Hotel concept. It aims to activate unused urban spaces called "voids" by allowing users to rent spaces for short periods of time using a mobile app. These voids, which make up 32% of the area studied, include rooftops, facades, and empty buildings. The app would let users search for available spaces, book spaces individually or together, design the space, and create activities or events. This is meant to increase density, social interaction, and dynamism while moving from traditional property ownership models to temporary memberships.