Premise: Slackness is a collaborative album between acoustic ska vocalist Chris Murray and the New York City ska band The Slackers. Two songs (Running From Safety, Rastaman Rock) also appear on The Slackers and Friends, as different versions. "Rastaman Rock" is renamed to "I Am a Rasta Man" on The Slackers and Friends. The track "Janie Jones" is a cover of a Clash song.
Hypothesis: The ska band The Slackers is from the United States.