Purdue University Northwest (PNW) presents its annual ShamROCK It Out Battle of the Bands, a spirited competition open not only to PNW students but to bands throughout Northwest Indiana, showcasing a diverse variety of artists and rhythmic styles at this musical showdown. ShamROCK It Out will take place starting a 6 p.m., Thursday, March 21, in Alumni Hall, Student Union & Library on the Hammond Campus. The event is free to participants and open to the community.