With his day job on pause between albums, Vampire Weekend drummer Chris Tomson took a risk drummers rarely take: He made a solo album. Produced by The Black Keys’ Patrick Carney, Youngish American trades in the kind of stylish, thinking-person’s pop-rock Vampire Weekend perfected on Modern Vampires of the City, with philosophical reflections on Bud Light labels (“Flag on the Can”) and personal worth (the punky “Will I Be Known to Her”) that are as immediate as they are ambitious.