system
A chat on subreddit /r/me_irl
human
I actually think this has been a pretty consistently-utilized writing environment for many prolific writers of past and present. Genuinely, not weird at all. Some of my most peaceful memories are reading alone at an airport bar. Just good vibes for the task.
gpt
I have to bury myself in a quite corner of the basement with ear plugs in to write.  I don't go to bars but I see people writing at coffee shops and wonder how they concentrate through the noise.