Ratatat is a dance band. A melodic, guitar-driven, videogame soundtrack dance band, but a dance band all the same. It took a while, but last night at a sweaty sold-out Neumo’s, the New York electro-rockers had asses shaking and all the kids jumping around. On the eve of their third album’s release, multi-instrumentalist Evan Mast and guitarist Mike Stroud (along with some guy and his damn big fro) kicked off their US tour with......