Early on in Sakina's Restaurant, Aasif Mandvi - both author and sole actor - is a narrator, Azgi, who a recent arrival to America from India.  Soon after he gets here he tells us, I have found that in America, if you just smile and nod your head, and say "yes, yes, yes, you are absolutely right" people love you!   This is pretty much how this play is structured.  There is a lot of yes, yes, yes as we empathize with these characters' journeys.  There is not, however, some specific element that ties them all together, other than their heritage.