Philadelphia indie rock quartet the Districts put all the pieces together on their third LP, Popular Manipulations. Friends since grade school, bandmates since high school, the four members have grown up in front of their fans, self-releasing their first album in their teens and signing a deal with Fat Possum Records not long after graduation. While earlier releases revealed a scrappy, hard-working band performing beyond the expectations of their tender age, they had yet to lock onto an essential sound. Produced in part by returning collaborator John Congleton, Popular Manipulations is a significant step forward for the Districts, taking a more streamlined yet experimental approach delivered with a buckled-down intensity that leaps out of the speakers…