Reviewed by David Sheward
Farce and drama blend in Sarah Ruhl's odd but endearing new work, <cite>In the Next Room or the vibrator play</cite>. This is the type of play no commercial producer in his or her right mind would ever mount on the Main Stem, but Lincoln Center Theater is presenting it at the Lyceum because <cite>South Pacific</cite> continues to run at the Vivian Beaumont. It's challenging and strange and addresses the uncomfortable…