My aim as a designer is to appropriate and link urban idle spaces to open up their (hidden) potential to an intense personal experience. “Gastspiel” is a format for a series of temporary interventions based on the theatrical event. Six idle venues in The Hague are transformed into spaces of reflection and interaction. Each space reflects one stage of performativity: rehearsal, gather, warm-up, performance, cool down, disperse. This multi-locality approach enhances vitality in the urban realm in engaging different audiences and stimulating interactions on different focal points. From cultural events, physical workshops, public debates, pecha kuchas and personal retreats, “Gastspiel” offers a diversity of experiences in the city.