What Biz is it at Saint Malachy's?

While I was leaving the free yoga class (free 'cause I won a month membership! Yay!) from Levitate Yoga on 49th street, I was startled by the peal of church bells across the street. I was also then startled to recognize a popular musical theater tune by a particularly famous musical theater composer.

Irving Berlin?!?

Listen to it here.

The church is Saint Malachy's, The Actors' Chapel. Fitting...!