How does the author present male record buyers?

In chapter 1, the narrator describes the men who always buy records from his shop on Saturdays. He describes them as "young men, always young men, with John Lennon specs and leather jackets and armfuls of square carrier bags." From this description we can infer that some male record buyers idolize musicians so much that they mimic their style. The "armfuls of square carrier bags" also implies that these men are somewhat obsessive. The narrator subsequently describes these men as the type "who seem to spend a disproportionate amount of their time looking for deleted Smiths singles and 'ORIGINAL NOT RE-RELEASED' underlined Frank Zappa albums." From this we can infer that male record buyers are perhaps a little pedantic, and also possibly a bit pretentious, in that they seem to value a record almost exclusively according to its rarity. The narrator summarizes his view of this type of male record buyer by declaring that, "They're as close to being mad as makes no difference."
In chapter 8, the narrator describes his customers again as somewhat obsessive, so much so that "unless they go home clutching a flat, square carrier bag, they feel uncomfortable." These customers are also described as "vinyl addicts" who feel some kind of emptiness if they walk out of a record shop empty-handed. In this passage the gender of the customers isn't explicitly stated, but we can infer, in part because female customers are so infrequent, that these customers are indeed male.