I know the "Fiddler On the Roof" script mentions a turntable at the very end for the final scene of all of the villagers leaving Anatevka, but I don't know if it was used at any other moments in the original production.
"Rebecca" uses one, and from what I've seen in video footage, it is awesome! Maybe someone here has seen the whole show and can give us a detailed description of how it was used. If you want to see it, THAT SITE has some good stuff for the search "Rebecca the musical."
-- SDG