*In the 20th century, Denmark Street had several Japanese businesses and was known as "Little Tokyo", but it became most famous as Britain's "Tin Pan Alley" housing numerous music publishers' offices.  - Concurrently or subsequently? 
 *to the Rookery - why the caps? The article refers to rookeries as a general noun. Do we have an article on this specific rookery? 
 *Per WP:LEADLENGTH, this article should have one or two paragraphs in the lead at maximum 
 *CN tag added. 
 *As this is an article on a British subject, shouldn't the metres go first? 
 *A lot of the sections are very short and could probably be merged. 
 *Disambiguation pages: Jacobite,  Fender  
 *Standardise whether or not you give life spans for people mentioned 
 *Any more information on Little Tokyo? 
 *Tokiwa restaurant and hotel - If this is the name of the restaurant (i.e. a proper name), it should not be in italics 
 *By the end of the decade, - which decade, 1950s or 1960s? 
 *Check for possible links, like Not Fade Away (song) for the Stones' single 
 *In 1964, The Kinks with Page on guitar and Jon Lord, later to form Deep Purple, on piano, recorded "You Really Got Me" in one of the basement studios. - I'd nix "later to form Deep Purple" to keep this sentence clearer 
 *More later