Playwrights Horizons launches its Unplugged wing—devoted to minimalist stagings that focus on performance and text—with the world premiere of Jacob Perkins’s ensemble drama about a women’s recovery group that meets weekly for a period that seems to stretch into forever. Les Waters (Dana H.) directs a wow of an ensemble cast led by NYC stage legends Kathleen Chalfant and Elizabeth Marvel and filled out very nicely indeed by April Matthis, Keilly McQuail, Mallory Portnoy and Maria Elena Ramirez.