The Casbah Coffee Club was, and still is, in the basement of a large house in Haymans Green, West Derby,

https://thecosmicempire.com/post/158806491824/a-domesticated-john-and-paul-at-20-forthlin-road  See also: http://winstonlennon.com/20-forthlin-road/ Visitors are a regular occurrence at Forthlin Road

https://twitter.com/WinstonLennon_/status/1154661219166498819?s=20 Above - The front room where John Lennon and Paul McCartney sat face to face with their acoustic guitars, working

Forthlin Road street sign In this house, John and Paul wrote 20 Lennon & McCartney collaborations, including I Saw her Standing