The Black Key man returned to the Late Night studio last week. He was down a Patrick Carney, up a bunch of guys who are not Patrick Carney. “My Last Mistake,” from Auerbach’s solo LP Keep It Hid, sees Dan how he is in real life, outside the Black Keys’ raw and minimalist garage blues frame: sprightly, hopping, smiling, rocking. Single life suits him. Watch it at Hulu. More Keep It Hid listens here and here.