i think there's a key concept i feel compelled to address in Americqn Psycho.
In the 80's music was still a bigger industry than movies & sports. Despite what 80's music magazines would publish about Judas Priest fans vs Duran Duran fans, music fans talked to each other amicably enough about hardcore, hippie stuff, goth, metal, pop: this soup led to Lollapalolooza being sold out in 91.
As a musician & music fan i heard all kinds of music convos. For humorous irony we invented conversations that would never happen, like "i can't wait to go home & re-binge my new Robert Cray album" or "i need musicians in my band influenced by Eddie Money" or "i love your new poster of Asia"
This is exactly what Patrick Bateman is doing. I never heard nor overheard any two people slow down their thoughtful conversation to discuss Huey Lewis & the News- i bet this includes the band members. They were just some tired old local blues cover band that got some stuff produced to fit in on
MTV.
TL/DR: i know music fandom well.
there are no Huey Lewis fans. they were just a vacuous trend between buying bell bottoms & becoming a Red Sox fan.