Famously, the Apollo Mission control team learned to handle multiple conversations stream simultaneously. The side effect was that going to cocktail parties was a nightmare, because they couldn’t turn it off.
Dinners with my extended family are like this (everybody talking at the same time, most people participating in two simultaneous conversations). After moving away for college, my sister would not talk during dinners when visiting because she found it took her weeks to get back out of the habit again.