S. Grady Putnam, 77, a Washington cafeteria manager for 30 years, died of cancer Saturday in a hospital in North Myrtle Beach, S.C.

Mr. Putnam came to Washington in 1934 as an assistant manager of the S&W Cafeteria near 15th Street and New York Avenue NW. He became manager four years later and retired in 1964.

The cafeteria featured such dishes as southern fried chicken, cor bread, and black eyed peas. Its regular customers included Senators Richard Russell of Georgia, Everett M. Dirksen of Illinois, and Clinton Anderson of New Mexico, Another regular patron, Sen. Clyde R. Hoey of North Carolina, would habitually dine in a cutaway coat, then would bow graciously to other diners at the end of his meal and say, "Good evening, it's beena fine evening."

The restaurant, which charged 10 cents for soup and 25 cents for steak in 1934, was forced to close in 1964 because of declining dinner trade.

Mr. Putnam was president of the Restaurant Association of Metropolitan Washington in 1942, and named "Restaurateur of the Year" by that organization in 1964.

He had been a preident of the Wood Acres Citizens Association, had helped organize one of the first Boy Scout troops in that part of Montgomery County. He also helped lead a drive to establish a community recreation center. The center was nemed after him in 1947.

Mr. Putnam was a member of the Metroplitan Board of Trade, the Izaak Walton League, and the Kenwood Country Club.

He was a native of South Carolina, and entered the restaurant business in North Carolina in 1927. He also had worked in Tennessee and Georgia before mvoing here.

He is survived by his wife, Selma, of the home in North Myrtle Beach; a son, S. Grady Jr., of Norristown, Pa.; a daughter, Mary Lou Norcross, of Gastonia, N.C.; a sister, Dovie Morgan, of Yanceyville, N.C., and eight grnadchildren.