The ability to speak to anyone doesn’t necessarily mean that you never feel lonely at parties. Good conversation is a two way street after all, and if you can’t find someone to challenge or interest you, then you can talk to people all night and not really get anything out of it. I think we all know that feeling, even those who aren’t as “gifted” socially as others.
I don’t think the solution is what the author does though. I mean, If you really can’t find someone interesting to engage with at any party or social event… I mean it’s a cliche to say this, but maybe it’s you?