Brill Building Pop applied the concept of professional songwriters in traditional pop to rock & roll. Numerous teams of professional songwriters worked at the Brill Building -- a block of music publishing houses in New York City -- writing songs for artists as diverse as the Coasters, the Drifters, the Shangri-Las, the Ronettes, Neil Sedaka, and Connie Francis. The songs were indebted not only to rock & roll and R&B, but also Tin Pan Alley pop, as the sophisticated lyrics and melodies proved. The productions on these early '60s records were also more sophisticated than most rock & roll records, featuring orchestras and bands with large rhythm and guitar sections. Though it fell out of favor after the British Invasion, both British and American pop/rock demonstrated an enormous debt to Brill Building pop for years to come.