I never know what is the etiquette in these situations but I'm always tempted to be "sorry couldn't help but overhear" and jump in to the convo....
Discussion
I've overheard random conversations where they are talking about something I'm directly involved in before.
I never had the guts to interrupt, maybe you should do what I failed to 😁
I just want to be like so hey, I love everything you're saying and especially how you're saying it 🤣
Drop a unique bit of information only somebody on the inside would know 👍
We're literally the only ones in this restaurant now and I'm just staring directly at them while giggling and ordering more margaritas 👀🤣👀