Although attending church services is an important tradition in North Georgia, worship is usually to the tune of a lone piano or organ, not the sounds of an all-acoustic bluegrass band. That is what made last Sunday morning’s service at First Presbyterian Church in Gainesville so intriguing to the congregation who attended “Come Away to the Skies: A High Lonesome Mass.” The musical event was performed by the church choir’s adult ensemble and the Chuck Nation Trio.