Music: Ballads on Broadway

In India, they call it nrtya (a dance play with integrated songs and music). The ancient Greeks had a name for it, too—but Broadway is still trying to find out how to do it. Oklahoma! was a step in the right direction. Last week Experimental Theatre came closer yet. Composer Jerome Moross and Lyricist John Latouche (Ballad for Americans) had cooked up three song-&-dance plays called Ballet Ballads for Broadway's connoisseurs and critics to sample. The critics found the dance-music-drama experiments "no end diverting and pretty . . . both rare and welcome."...