I use this one in real life all the time! Just pop over with the old “I couldn’t help but overhear” and you’re officially in the convo. People get over it super fast – if they don’t then you probably don’t want to be friends with them anyways!
It is especially useful in places where people don’t know each other very well – the start of the school year, any mixer, or a conference. Just budge in and make yourself a part of the conversation.
All tips from Leil Lowndes “How To Talk To Anyone“. The goal is to make self-improvement and self-help more enjoyable by turning it into webcomics.