HERTH Hall is having a special performance featuring JigJam, a fine young quartet all the way from Ireland. Doors open on Sunday, September 4 at 7 p.m. A full cash bar is available. JigJam is the hottest new act on the Celtgrass music scene. This Offaly quartet has developed an exciting, energy-fueled live sound blending the best of bluegrass and Irish folk music.