He was presumably warming up to play ... the Cavern Club where the Beatles played their early Liverpool gigs. Early on, when a fan yelled "Billy Shears!," Paul replied, "YOU are!" McCartney ...
The World-Famous Cavern ... club, which has hosted the likes of Paul McCartney, the Arctic Monkeys, Crowded House, The Libertines, Adele and many more over the decades. Old Baby Mackerel play ...