Yeah I've been doing this. Just staying in the room. Usually get a walk in though for an hour and do cooking. Situation for me is living with two brothers in a small house that belongs to just one brother. The other two of us are isolators if I can make up that word. I think the impression others might get is "he just likes to keep to himself" or "he's a quiet type, not talkative or social." Not always true but people are not thinking then of the key behind the behavior, something every human experiences all the time.. the feeling of anxiety.
People can even feel rejected, hurt and angry at the isolator. They make it about themselves in that case, because they don't fathom the real reason for the isolator's actions. He may be considered lazy, irresponsible, arrogant, poor at communication, weird, shy (likely true), quiet, not interested in others.. I'm sure there's more. He's probably some of these things sometimes. But that's not where it's at. It's an incomplete picture without reading into the anxiety, that the other is feeling. And how do we read that anyway?
Observation can help with this. Most people don't do much of this, I've observed. To see someone else without any evaluative thought, that's the ticket to seeing them.