If you took On the Town, stripped it down, and gave it a lobotomy, it might end up very like No Singing in the Navy, now cavorting upstairs at Playwrights Horizons. The entertainment, "written by" Milo Cramer, which I guess means they authored the dialogue and the simplistic songs, takes the three-sailors-on-24-hour-leave motif of the 1944 Bernstein/Comden/Green classic and twists it into an absurdist vaudeville. You…
