Are these Nashville gals a country group? A comedy act? Closet punk rockers? With a touch of Ramones-style marketing, the faux siblings Kelley, Jessi, and Nikki Darlin make a raucous debut. Down-home twang abounds: “Drinkin’ and pain go hand in hand,” they admit on the forlorn “Glass to You.” Declaring their independence in “Wild One,” they shout, “If you can’t handle crazy / Go ahead and leave,” but Those Darlins’ tales of lust- and booze-fueled misconduct will make even country-music haters want to stick around.