A conferencing system provides the scheduling of virtual meetings with meeting lobbies so that a meeting presenter can conduct a virtual meeting without the need to send out invitations to attendees. A person that wants to conduct a virtual meeting can schedule with the conferencing system a meeting with a meeting lobby. The meeting lobby has an address, but there is no associated privileged information, such as a meeting password. Would-be meeting attendees use the meeting lobby address to enter the meeting lobby as visitors in the lobby, and request to enter the meeting from the meeting lobby. A meeting presenter can then either grant authorization for a visitor in the meeting lobby to enter the meeting, or deny authorization for a visitor in the meeting lobby to enter the meeting. If a visitor in the meeting lobby is denied authorization to enter the meeting from the meeting lobby, the conferencing system removes the visitor from the meeting lobby.