how do you handle accidental polycule overlap at a swinger club, like running into your play partners other play partners

happened to us last month and im still kinda processing it lol. so we were at our usual club, saturday night, dh and i had been chatting at the bar with a couple we've played with maybe 4 times over the last year. lovely. then the man's phone goes off and he says "oh thats sarah", and like 20 mins later sarah and her husband walk in and head straight over for hugs. turns out sarah and her husband have also been seeing our friends regularly. and then i look at sarah's husband and im like, hi yes i know you, we played with you and your wife at a hotel takeover in june. so now im standing in a 6-person circle at the bar where every adjacent pair has slept with each other except me and sarah, and we've been making polite eye contact for 4 minutes going "ah". no one is being weird and yet the air is heavy with the math of who has done what with whom and how recently. i was kinda fine in the moment, the conversation went on, but afterwards in the uber home i was thinking — there isnt really an etiquette for this. polyam ppl have explicit metamour protocols. swingers have basically nothing for "your play partners other play partners". ive read polyam literature on this whole "incidental polycule" thing but it doesnt map cleanly onto LS where nobody is officially anyones anything. how do ppl handle these moments. do you actually want to know in advance who else your regular play partners are seeing. do you avoid certain people on club nights bc you've worked out the math. is there a metamour-lite concept for LS or do we just laugh in the uber and move on.