Everything you need to know about the Cold War Kids. band: the rousing piano chords, the dance-ready drumbeat, and, most of all, the soulful cries of singer Nathan Willett. What it lacks is an actu. “We hit the crowd with a big rock tune and it’s a complete contradiction,” said Isaiah Work, lead singer for the band that will headline shows. Metallica’s “Sandman” and Nazareth’s “Hair of the Dog. Sacred…