Routh M. Robbins has been selected for "honoris cause" membership by the Rho Epsilon fraternity. Her nomination was sponsored by the Virginia Commonwealth University chapter of the honorary real estate fraternity. Mrs. Robbins headed her own real estate firm until illness forced her retirement early in 1976, when the firm was acquired by Coldwell Banker as a residential brokerage subsidary in this area.

The Routh Robbins Real Estate Corp. has named Joseph P. Gleason as resident manager of the sales office in Annandale. He joined the firm in 1970 and became a top-ranking lister and seller of homes. He holds a master's degree in business from Syracuse University.

Robert Reed has been named vice president for commercial sales of Holland & Lyons, a real estate firm that specializes in in-town properties. He has been with the firm since 1974 and formerly was in charge of condominium sales. Also, Bobby Hill has been named treasurer of the firm. He had been comptroller.

Bernard V. Parrette, a Washington attorney who formerly was deputy general counsel in the Commerce Department, has joined Frederick H. Denston Co., a commercial brokerage firm with offices in the Investment Building. Parrette is concentrating on the analysis and sale of income properties.

Walter L. Benning, president of the Manufactured Housing Institute, has been named to the task force on housing costs formed by the Department of housing and Urban Development.