Introverts can do nothing for hours. Don't ask "are you free". No, they aren't. They're doing nothing. Thinking nothing. Feeling nothing. They're just there. Existing. Staring at walls and all. That's how they refuel. Chill. Feel whole again. But you won't get it.
You can't imagine the amount of fun introverts have, but they don't care if you know. The thing is they chill different. Few people, a cozy place, food, some good old music, and mind boggling conversations. That's it. No crowds. Nothing fancy shit. Just old school vibing.