Robert L. Brenner, entertainment attorney, died Wednesday in Los Angeles as a result of liver failure. He was 56.Born in Brookings, S.D., Brenner moved to Los Angeles in 1960 and joined the law firm of Pacht, Ross, Warne, Bernhard and Sears, where he represented such clients as Jerry Lewis, Red Skelton and Bobby Darin. In 1971 he formed his own entertainment law practice, initially with a specialty in music clients, representing such acts as Kenny Rogers, Fleetwood Mac and Manhattan Transfer. He later moved away from music into film contract negotiation, for a while serving as in-house counsel for Carolco, where he pioneered in film foreign-rights pre-sales. He later represented such clients as Lee Grant and Joseph Feury, Andy Vajna, Moctezuma Esparza and Bob Katz. Survived by his wife, Susan; children Michael, John, David and Leslie; a brother and a granddaughter. Memorial service will be held today at 2:30 p.m. at Temple Beth Shir Shalom, 1827 California Ave., Santa Monica. In lieu of flowers, the family suggests donations to the Michael Brenner Educational Fund, 11902 Windward Ave., L.A. 90066, or to the charity of your choice. … Howard Klein Dr. Howard Klein, father of writer/producer Arthur Klein, died Jan. 24 of a heart attack at his home in Aventura, Fla. He was 66. He is also survived by his wife Phyllis, two sons, a daughter and five grandsons. Private services were held in Florida Jan. 26. In lieu of flowers, family suggests donations to a heart charity.