The essential elements to Matt Dorrien’s rollicking, Tin Pan Alley-inspired new record are as follows: piano, Nilsson, whiskey, heartbreak, a little more whiskey, Randy Newman, old phonographs, and New Orleans brass bands. A big, swinging pean to loneliness and the golden age of pop songwriting, In the Key of Grey is the sound of East Village piano bars long past closing, when the house musician has had a few too many, and the regulars are gathering ‘round to drown out their sorrows in song.