Jack Kleinsinger, a lawyer by day who in his evening hours indulged his passion for music by creating and running Highlights in Jazz, one of New York’s longest-running concert series, for which he arranged and hosted more than 300 shows over a 50-year run. Mr. Kleinsinger died on June 11 at his home in Manhattan. He was 88.

He once said he never intended to leave a legacy. He just wanted to hear good jazz, and he befriended many of the artists me met in the city’s jazz clubs and concert halls.

Mr. Kleinsinger left no immediate survivors, nor did he leave any directions for his burial other than his wish to be cremated. A few days after his death, his cousin Elizabeth Elliot arranged for him to be interred in a mausoleum at Woodlawn Cemetery in the Bronx, where many jazz greats are buried. His remains sit in a niche just a few rows away from those of the actress and singer Diahann Carroll.

“Somewhere, Jack is smiling,” she said. “I’m sure of that.”