The second act of “Irving Berlin’s White Christmas,” now playing at Surflight Theatre, opens with a tap dance set to Berlin’s song “I Love a Piano.”

I do love a piano, but at the risk of showing my age, I love tap even more. That dance set my heart to pit-a-patting along with others directed and choreographed by Paul Hammons Sloan, including an obviously influenced by Bob Fosse canes-and-top-hats soft shoe number set to the song “Blue Skies” that ends Act I.

“Irving Berlin’s White Christmas” is a relatively new musical. It premiered at the huge Muny amphitheater in St.