Maude Maggart finishes out a six-week stay at the Algonquin Hotel’s Oak Room near Times Square this Saturday. She’s an appealing throwback, including in her repertoire; her best album, I think, is a collection of old Irving Berlin tunes. Her voice is sultry yet sweet, laced with vibrato, pure in tone, mischievous in intonation. Her current show, called “Speaking of Dreams,” which I saw last night, is ripe with naturally passionate slow ballads. Her few shifts uptempo (Sondheim’s “On the Steps of the Castle” and a Jobim tune with acid-trip Marshall Barer lyrics called “Lost in Wonderland”) made me wish she’d do more, but I’m not complaining. Her swoon through “Isn’t It Romantic” was bewitching. Even the show’s one cabaret clich—a medley of “Somewhere Over the Rainbow,” “Look to the Rainbow,” and “The Rainbow Connection”—came off as anything but; it was even stirring. Ms. Maggart looks five or so years younger than her 32 years, and she’s been singing in public for more than half of them. Cabaret clubs are not usually my scene, but I’ll go see her again happily.