I've rejoined just to back up what a previous poster said.
I agree some of the things might be perceived as a "bit" annoying or not social etiquette.
But it's not affecting anyone beyond a few seconds!
If you were walking across the room/getting into people's personal space/harasssing your pregnant colleague by message/demanding money and time..but you're not?
Often "ambiguous behaviour" is used to target one person and Other them.
If Person A does it, its fine - its a joke or "who they are".
Or someone will do or say something to smooth things over or reinforce they are part of the "in-group".
If Person B does it, it warrants ignoring and tutting and them being "corrected".
(person B often is the one who is non-white, not NT, easy designated group scapegoat).
As a non-white woman I've definitely learned the hard way to not try to "banter"/be 100% socially relaxed in environments as what I do has often been interpreted in the most unpleasant way possible.
Some tall white guy (not even a permanent office member) says something - others hangs onto his every word.
I try to join in - no one makes eye contact and pretend they can't hear unless I get up and repeat myself (and then I'm "annoying" or "aggressive" or "attention-seeking").
In the Office Hierarchy, some people like highlighting others are "beneath them" or "undesirable" (or invisible unless a favour is required of them. Or if "desirable" people aren't turning up then suddenly the Undesirable People are OK to socialise with).
Agree with pp who said keep yourself to yourself, grey rock, and find a quiet social strategy to detach from this group and practice self-care and just focus on your own wellbeing and goals.
Take care OP.