Leaving the audience wanting more is the goal of every musician, unless you're a musician in violence-torn Mexico. Two members of local group La Excelencia were murdered in a Guadalajara bar early Monday morning after refusing to play more songs past closing time, El Occidental of Mexico reported. Jonathan Martinez, 22, and Gustavo Alejandro, 35, were pronounced dead outside the Vida Divina nightclub, gunned down by unidentified assailants with suspected ties to the country's notorious drug gangs. A third victim, identified as bar patron Leslie Soltero, 26, was taken to a local hospital with a gunshot wound to her ankle....