No more than 3. I flow like wine when it comes to 1 or 2 people in a circle. When it becomes a bit crowded, I tense up, and when and if I do talk, I speak very low borderline mumble.
I get all smiley and just incredibly awkward. Especially when I try to leave the circle. I fidget, I have to keep my hands in my pocket, I look around the room, Im taking more sips of my beverage in hands, my leg starts to bounce if Im in a seated position. I tense up and stress out about how to leave this circle without it being awkward.
This includes family as well.