On October 23, 2020, Seb Castle took over the booth at the iconic Sala Coliseo, one of northern Galicia's nightlife hotspots. This debut marked the beginning of a strategic residency, where the goal was to revitalize the venue's sound through a precise reading of the dance floor. Although the global health situation at the time limited the residency to two intense months, this stint at Sala Coliseo was key in demonstrating resilience and drawing crowds in one of the most challenging contexts the entertainment industry has ever faced. It was a period of maximum technical demands that served to consolidate his name on the circuit of large-capacity venues in Spain before his leap onto the international scene.