In their interpretations of songs like “A Kiss to Build a Dream On” and “When You Wish Upon a Star,” their different musical backgrounds combined to create a sound that set them apart from similar lounge and cabaret acts.

“Although Ms. Whitfield and Mr. Greensill are not the only married cabaret performers who work together, no cabaret couple in recent memory has expressed their devotion through such intense but subtle musical communication,” Stephen Holden wrote in The Times on the occasion of a four-week engagement at the Oak Room in 1993.

They released “Until the Real Thing Comes Along” (1987) and other albums on their own label, Myoho Records, before the Grammy-winning producer Orrin Keepnews signed them to his label, Landmark, in the early 1990s. They released some 20 more records together, usually with other musicians, on Landmark and other labels. Their last studio album was “Message From the Man in the Moon” (2007); they also released a live album, “The Best Things In Life,” in 2011.

In the 1990s, Ms. Whitfield and Mr. Greensill performed at Carnegie Hall and at a White House luncheon for Hillary Clinton, who was then the first lady, and spouses of senators. Their last performance together was at Silo’s in Napa, Calif., in June 2017.

Wesla Whitfield was born Weslia Marie Edwards on Sept. 15, 1947, in Santa Maria, Calif., about 60 miles northwest of Santa Barbara. She was the youngest of three daughters of Vernon Edwards, a welder who worked in oil fields, and the former Eleanor Smith, a homemaker.

She graduated from high school in Santa Maria and attended Pasadena City College before receiving a degree in music from San Francisco State University in 1971. She started singing with the San Francisco Opera that year and stayed with the company for four years, before her preference for nightclubs won out. After leaving the opera, she worked for a time as a singing cocktail waitress.

Her first marriage, to Richard Whitfield, ended in divorce, as did a brief second marriage. She kept the surname Whitfield because she liked the alliteration with Wesla.