Went out for dinner the other night.
Three of my friends were already there when I got to the restaurant.
One was talking (about something major, I soon found out) and the other two were listening.
However the listening two looked up and smiled when I got to the table but the talker just carried on talking, it was a bit awkward tbh!
One of the listeners briefly explained what the talker was talking about, to put me in the picture. The other listener said "let's just say hello to Mintyy and then you can carry on".
Talker was rude, yes? She is someone who can't generally be stopped once she starts but it's basic manners to pause and say hi to someone else joining your group?