In a city as dense as New York, unused space is rare. Block Party maximizes the potential of abandoned space in the city by exploring the hybridization of infrastructure and building. Vacant and unused portions of subway stations are reclaimed for bike storage, capitalizing on New York’s initiatives to encourage commuters’ bike and subway use. During rush hour, the storage units remain compacted under the street, but expand to double their size during off hours. By taking over the street, Block Party creates a new landscape that responds to both traffic patterns and infrastructure.