Chat rooms always show up even there is no user activity at a present time. Chat rooms stay even after days. How to delete them? And can we delete them?
No one is going to learn things from a chat anyways.
Any chat which contains more than 15 messages by at least two users is considered a public artifact; it will automatically be frozen (which prevents further activity and removes it from the default room list display) if it remains inactive for two weeks.
If a room does not reach this threshold, it will delete itself after a week.