In the Home tab, look for the “Activity” column on the right side. Click the links in that column to view Activity Details of that Room.
The Activity Details will show you the screenname and email address* of people who have entered the room.
*Note: The email will only show up if that person is a registered user. If you require email addresses of everyone, you can force them to register for Vyew before entering the room. Be aware that forcing registration may lower your response rate of people entering your room because they may not feel like registering.