I only recognize two songs!
Three for me: Instant Replay, MacArthur Park and I Love the Nitelife. Judging from the names of some of the groups -- NYCC, Crown Heights Affair, Eastbound Expressway -- I have a feeling the popularity of those songs was limited to the New York club scene. At one point, Boston had TWO disco stations -- WBOS was first, but was quickly obliterated by WXKS after a very brief competition. I wonder how their playlists compared with those of WKTU. Big differences due to the distance from New York City, or was disco in its infancy so closely tied to New York that all the start-up disco stations played the same songs?