Open'er Festival draws 120,000 to Kosakowo airfield for rock, hip-hop, and electronic headliners, making this modernist port of 250,000 home to one of Europe's most respected events. Gdynia Arena (11,000) handles touring while Ucho and Teatr Muzyczny add mid-size shows. The Tricity with Gdańsk and Sopot collectively creates a 750,000 entertainment market.