Barbershopkoren Achterhoek-NjoyAlmere-FlevofunAmstelveen-Amstel RiverBathmen-SyncopationBest-UnlimitedEde-Valley VoicesEindhoven-Barber MatesElst - Between Two RiversEmmen-Dolmen4 quartetEpe-Swinging WoodnotesGoes- BarbershopkorenGoes-Goose City SingersGorunchem-BewitchedGreyhound B.SingersHaarlem-Barbers&BishopsHarderwijk-Dolphin B.MatesHarderwijk-New AchordHeerhugowaard-SingingMaarssen-Sound AroundMainport Barbershop SingersNieuw Vennep-FH SingersRotterdam-Sound WavesSkyline SistersSteenwijk-Swinging StonesThe Frisian HarmonizersUtrecht-Rhine SingersZaandam-Whale City SoundZoetermeer-Sweet Harmony S.