Few musical outfits have the genre-jumping appeal of Chicago rap duo The Cool Kids. Their clever rhymes and retro beats recall old-school rap (as they sing, they are “bringin’ ‘88 back”), a great way to grab the hip-hop audience. But “Mikey Rocks” and “Chuck Inglish’s” thrift-store wardrobe and silly subject matter (not to mention [...]

Plus, a primer on the rap duo.