When Infadels debuted in 2006, the U.K. quintet were kind of caught between two poles—the danceable post-punk of, say, Bloc Party and the nu-rave of mega-buzzed about bands like the Klaxons. As a result, Infadels didn’t get the hype of those bands, but they may have staying power beyond expectations—especially if a track like the new single “Ghosts” is any indication.