PETER BJORN & JOHN Gimme Some [Startime] Writer’s Block wasn’t Peter Bjorn & John’s first record—in fact, the group’s 2006 U.S. breakthrough was the Swedish trio’s third release. Even so, 2009’s unfocused Living Thing, felt like a victim of the sophomore slump. They’ve shrugged it off on their latest with 11 catchy pop tunes that are punchier than a boxing gym on fight night. Guitars bob and weave on “Dig a Little Deeper,”...