Olgita DeCastro Marino, 64, who recorded and performed with the 1950s vocal trio the DeCastro Sisters. Marino was a cousin of the original DeCastro sisters, Peggy, Cherie and Babette, who were raised in Cuba. The trio gained popularity in the 1950s with a slick and flamboyant nightclub act and recordings that featured ballads and novelty numbers. Its first smash hit was “Teach Me Tonight,” written by Sammy Cahn and Gene De Paul, in 1954. Other successes in the ‘50s included “Boom Boom Boomerang,” “Too Late Now,” “Snowbound for Christmas,” “Give Me Time” and “Cowboys Don’t Cry.” Marino joined the act in the 1960s as an occasional substitute, but later permanently replaced Babette DeCastro when the latter married and retired. Marino joined Peggy and Cherie DeCastro on the comeback trail in the late 1980s in Las Vegas. The trio recently performed at the Hollywood Roosevelt’s Cinegrill and toured last year with Buddy Greco and Gloria DeHaven. The DeCastro Sisters were mentioned this month on HBO’s hit series “The Sopranos” as the favorite singers of the Soprano matriarch, Livia, played by Nancy Marchand. On Monday after an asthma attack at her Las Vegas home.