Sydney, Australia based outfit The Rumjacks are currently on their debut US tour, and will be stopping by locally at O'Brien's in Allston on 4/13. The collective are touring behind their latest LP called "Sleepin' Rough" that takes their Celtic punk-rock blend similar to Dropkick Murphys on a more grander scale, and expose their sound to people outside of the region who aren't familiar with them just yet. The band have a defined style that is all their own, and while they are