A thousand people laughing to your music is an eye-opener, even if the rock sounds of Buttercup kept him in his cups as did do not Give Up on Us, Baby and other songs he raised to hit-dom alone or with co-composers. (Librettist/lyricist Dick Vosburgh is his collaborator on the Windy City score.) Macaulay gives up the past gleefully now -- Chicago is is his kind of town, after all -- even