Where does “nightlife” come from?

I can't write this etymology because the chain you've provided contains only circular repetition (night/nightclub alternating) with no actual language progression or historical origin. An etymology requires a traceable path through different languages or documented historical forms showing how a word evolved. To write an accurate origin summary, I would need a chain like: English nightlife | English night + life (compound) | Old English niht | Proto-Germanic *nahts, etc. Could you provide the actual etymological chain for nightlife?

nightlife (English): Nocturnal activities, especially visiting...

Definitions

  1. Nocturnal activities, especially visiting...

Ancestry of “nightlife”, step by step

nightlife traces back through two separate lines of ancestry.

via English life

StepLanguageWordMeaning
1EnglishlifeThe state of organisms preceding their death,...
2Middle Englishlyflife
3Old Englishlīflife, existence; life-time
4Proto-West Germaniclībbody; life
5Proto-Germaniclībąbody; life
6Proto-Germaniclībanąto remain, to be left
7Proto-Indo-Europeanleyp-to stick; fat or sticky substance
8Proto-Indo-Europeanlēy-to leave, let; to want, desire; to let; leave...

via English night

StepLanguageWordMeaning
1EnglishnightThe period between sunset and sunrise, when a...
2Middle EnglishnyghtAlternative form of nighte; Alternative form of...
3Middle Englishnightenight
4Old EnglishnyhtAlternative form of niht
5Proto-West Germanicnahtnight
6Proto-Germanicnahtsnight
7Proto-Indo-Europeannókʷtsnight
8Proto-Indo-Europeannegʷ-bare, naked

Words derived from “nightlife

Every word from Proto-Indo-European lēy-Every word from Proto-Indo-European leyp-Every word from Proto-Germanic lībaną