Showing this month at St Ann’s Warehouse in Brooklyn, Mair Nair adapts Monsoon Wedding, the 2001 beloved Bollywood movie about a cross-cultural wedding, for an off-broadway audience. Arjun Bhasin designs costumes, Vishal Bhardawaj is on the score, and David Bengali designs projections to engulf audiences with Indian color and cheer. But, along the way, Monsoon Wedding…