After Henry and Lenina leave the cabaret, Huxley comments that they remain in "happy ignorance of the night" and describes the stars as "depressing." What social commentary does he make by using with his description of nature?

Huxley is commenting that most people in society prefer to live in "happy ignorance" as opposed to having knowledge. The stars, or truth, are "depressing."

This is because that many find the truth upsetting and would prefer to live in the dark. Huxley is saying that for many, ignorance is bliss.