From jam sessions at neighborhood pubs in Ireland to performing for the Chinese government on a national errand, this group has established itself as a forerunner in the traditional music world for more than two decades. Dervish, whose name refers to any group of spiritual people who become enraptured by music, brings a world of excitement to its shows. Its performances are a myriad of tones and moods ranging from high energy tunes played with fluidity and intuitiveness, to beautifully measured songs, to charming lyrics of life and love, to inspiring melodies, all drawn together by lead vocalist Cathy Jordan’s masterful stage presence.