If you’re under 30 and experiencing the “new” disco punk movement for the first time, this is a perfect compendium, to educate yourself on what happened in the early ’80s, the brief merger that’s now heading into its official revival. You may have heard of bands like Gang of Four, Scritti Politti and Liquid Liquid from your youth (all of whom appear here), but it’s those under-the-radar cuts, like Maximum Joy’s “Stretch” and Delta 5’s “Mind Your Own Business,” that fully flesh out this enduring relationship between rocking and grooving.