Jerome Kasswrote the Tony-nominated book for the 1978 Broadway musical “Ballroom,” which was adapted from his own Emmy-nominated teleplay about older people who salve their loneliness on the dance floor. Mr. Kass was the author of a handful of Off Broadway stage works, and among his other television credits is the mini-series “Evergreen” (1985), which was based on a best-selling novel. His best known work was “Queen of the Stardust Ballroom” (1975), an adventurous melodrama. Mr. Kass graduated from Stuyvesant High School in Manhattan, earned a B.A. at New York University and did graduate work in English there and at Brandeis University. In addition to his wife the writer Delia Ephron, whom he married in 1982, and his sister Gail Kass, Mr. Kass is survived by two children, Julie and Adam Kass, from a first marriage, to Artha Schwartz, that ended in divorce.