Dan LeFranc’s Rancho Viejo, like his excellent 2012 play The Big Meal, echoes with cosmic significance. The Big Meal was life itself; in Rancho Viejo the subject is more difficult to discern, but it seems to be the way assimilation into a society comes about and the obstacles therein. The title is the name of a residential community that exists in Dane Laffrey’s set as one beige, minimalist, Southern California living room, with floor-length windows upstage looking onto a garden path, no matter which of several homes the action cycles through. The viejo—Spanish for “old”—applies to all but one of the characters, who are firmly in middle age.