Very interesting to think about, considering my anxiety tends to push me in the opposite direction, so I favore less crowded spaces or less physical closeness to other people.
The acoustic component is worth diving into, to me, since this is a big trigger. If the space is too loud, or cacophonous, I end up starting to lose higher-order functioning and have to vacate or wear my earplugs/noise-canceling headphones and just cut myself off from the sound (makes my job pretty awkward at times, tbh)
Small spaces amplify this acoustic aversion for me, especially when there are already people occupying the area. It's not claustrophobia, more of a "my brain will try to focus on all sounds at once and get sensory overload, so I probably should not go/stay there."
Anyway, thanks for the food fir thought.