It’s kind of weird to me when you meet a bunch of people who already know each other, and you just walk in their place. They know their past & present; whatever they are saying doesn’t really make sense to you, but you are trying at least to engage. (you are not really into it) You are doing this because your friend who invited you and did a nice gesture. You should be thankful and don’t be dick.
I have no problem to chat with any stranger or start conversation but really don’t want it in this stage of life. Because you want to be comfortable with people you know and they know you. I think I’m lazy to share who I am, what I do this and that. I wish everyone shares their attendees list before any meetings, events or house parties. So you don’t have to ask those general questions. We will have more time for deep conversations.