Open'er Festival
opener festival music festival take place north coast poland gdynia one biggest annual music festival poland first edition festival organized warsaw open air festival open’er festival best major festival prize european festival award ceremony first open air festival held tor stegny warsaw chemical brother playing main stage festival took place kościuszki square gdynia last festival kościuszki square attracted people since festival taken place kosakowo airport babie doły military airport gdynia main organizer festival concert agency alter art stage orange main alter beat firestone tent also smaller stage run sponsor vendor artist also performed silent disco area seaside gdynia gdynia open stage event free attend opener festival website