Be There or Be Square?

I am currently travelling, so being somewhere somewhat escapes me.

I am currently also quite focused on interpersonal matters, so phrases like “be there or be square” are currently particularly intriguing.

If you don’t wish to offend someone by saying that they are boring or uncool, it would be best to avoid this phrase and to use an alternative phrase instead, such as ‘I hope you can make it’.

https://www.phrases.org.uk/meanings/be-there-or-be-square

I have very little (or nothing) to conclude here — apart from (perhaps) that I feel as though this sort of threat is often woven into the fabric of communications in a competitive atmosphere.