We don't have precise details of exactly how many trips Lowry made to music halls in Birkenhead, Liverpool, Cambridge or London. However, there are clues scattered amongst his work and his early letters that he was very familiar with music halls which was a popular form of entertainment in the 1920's.
In a letter to his teenage friend Carol Brown in early May 1926, Lowry mentions Stanley Lupino who was a comedian who Lowry must have seen in pantomine or at a music hall.
And then you fairly rubbed it in about being in love with love and not with me. Do I need telling that? Why, as Stanley Lupino says, Why Naow. Collected Letters of Malcolm Lowry Volume 1
Stanley Lupino (15 May 1893 - 10 June 1942) was an English actor, dancer, singer, librettist, director and short story writer.
Lupino began his career as an acrobat and made his stage debut in 1913 and first became known as a music hall performer and played in pantomimes at the Theatre Royal Drury Lane. Between the wars, Lupino wrote and performed in several shows, including Phi-Phi (1922) and From Dover Street to Dixie (1923) at the London Pavilion, and several at the Gaiety Theatre in London, including Love Lies (1929), Hold my Hand (1932), and Sporting Love (1934), which ran for 302 performances. He also wrote and starred in So this is Love (1929) at Drury Lane. He also performed extensively for BBC radio. Later, he turned to screenwriting and films, although he also continued on stage in works like Lady Behave (1941).
Lupino was a member of the celebrated theatrical Lupino family. His father was actor George Lupino. He was the brother of actor Barry Lupino and the father of Ida Lupino. Lupino published From the stocks to the stars: an unconventional autobiography in 1934. Wikipedia