NEW YORK—The Peppermint Lounge is filled with mostly college-aged kids and more than a few patrons who look like the 19-year-old age minimum is part of their imagination, or at least the result of some artistic fiddling with their driver’s license.

They’re all there to see Mari Wilson, who’s dippity-dooing through her set of revived early ’60s soul/pop, right down to her elbow-length white gloves, beehive hairdo and a band sporting matching black turtlenecks and white sport coats. It’s a blast from the past and, for the kids at least, it’s still a blast.