The use of events as policy tools in cities has become widely recognized. However, most studies concerning this topic do not capture the complex interrelationships that underpin the development of an eventful city. This study applies a practice approach, in order to analyze the dynamics of the eventful city practice. It places the urban event practice centrally in the analysis and focuses on the actual "sayings and doings" of the practice. The event practice of the 2015 Incubate festival in Tilburg, the Netherlands, is analyzed by means of ethnographic methods, including participant observation and interviews. Incubate illustrates how both the city and the event are performed within the practice: the event shapes the city and the city shapes the event. However, the integration of the festival into alternative spaces in the city means that it does not increase the visibility of Tilburg, and therefore fails to deliver value to its eventful city policy.