What is "junior's"

Junior's is a restaurant at 386 Flatbush Avenue Extension at the corner of DeKalb Avenue in Downtown Brooklyn, New York City. The restaurant also has a location inside Grand Central Terminal in Midtown Manhattan, one in the Times Square area, and one in the lobby of the MGM Grand Hotel in the Foxwoods Resort in Ledyard, Connecticut. The restaurant was founded by Harry Rosen in 1950. According to the restaurant, it was named Junior's after Rosen's two sons, Walter and Marvin.