The Meeting That Started Without an Agenda and Ended Without a Decision

You walk into the room. Someone says "let's get started." There's no agenda. No stated goal. No clear outcome expected. An hour later, you walk out. What happened? You talked about things. You discussed some stuff. Someone mentioned something about Q3. There was a tangent about vendors. Someone asked a question that didn't get answered. You have no idea what was decided. You're not even sure anything was. This meeting has a name in every company: the meeting that could have been an email. Except