CEILI BAND Ceili band is also a name given to a traditional group ensemble. Ceili band music is more formal and highly stylised compared to a Grúpa Cheoil ensemble. To become a member of a Ceili Band often involves rehearsing a specific set of melodies for competition. Each of the 10 performers in the band must be proficient in his/her instrument and must be able to play specific timings and complicated rhythms and also memorise intricate variations within each musical arrangement. As with Grúpa Cheoil teamwork is an essential element within the members of the band.