A uniquely Tejano version of the old-fashioned political barbeque, the traditional South Texas pachanga allowed politicians to connect with voters in a relaxed setting where all could enjoy live music and abundant food and drink along with political speeches and dealmaking. Today's pachanga still combines politics, music, and votes--along with a powerful new element. Corporate sponsorships have transformed the pachanga into a major marketing event, replete with celebrity performers and product giveaways, which can be recorded and broadcast on TV or radio to vastly increase the reach of the...