No, they stand by the wall because it's anxiety-inducing to throw themselves into the thick of things. They want to be approached, just not surrounded. At least

No, they stand by the wall because it's anxiety-inducing to throw themselves into the thick of things. They want to be approached, just not surrounded. At least, that was how I always felt, before I started forcing myself to drift and mingle more. There's the fear of not being able to keep going with smalltalk and such, but also the conflicting desire for interaction.