Or have someone with moderator permissions a secondary appointee to take that meeting in a private area in the office. Cosmos team - I would introduce a "Close Door" feature here so when in a room or office. The meeting settings can automatically "close" the door preventing users from just coming in- or allowing a admin, host, or moderator close the door manually. This would be considered an isolation mode for the UI perspective and a live private session on the call's perspective. Any users trying to join a closed door meeting will be prompted to knock or require an appointment 🌟. No need to create a whole new team space just for that.

Or just locked offices only available to certain members which can be specified.