The New Abnormal, the Strokes’ sixth album and first in seven years, mostly just feels like a hangover.It’s sluggish and slight, and the strongest hooks are so familiar that they require additional writingcredits for the ’80s hits they copy note-for-note (Billy Idol’s “Dancing With Myself” in “Bad Decisions,” Psychedelic Furs’ “The Ghost in You” in “Eternal Summer”).