Jaclyn Backhaus’s “India Pale Ale” currently running at Manhattan Theatre Club’s New York City Center Stage I has acollection of “teachable moments.” Some of the lessons are rather unimportant though interesting. The audience learns the history of IPA (India Pale Ale), the hops and alcohol content of the iconic enhanced pale ale, and how at least one white hipster Tim (a lumbering and naïve Nate Miller) does not know what the “I” in “IPA” stands for. Other lessons are significantly more important. The audience learns the migratory history of Basminder “Boz” Batra (an energetic and spirited Shazi Raja) and her Punjabi family to the United States and theirnew home in Raymond, Wisconsin. Boz and her brother Iggy (a deeply sensitive and ebullient Sathya Sridharan) are second-generation American citizens.And the audience learns that Boz wants to leave Raymond and open a bar in nearby Madison, Wisconsin.