Google Chat / Google Chat Power User
Managing space members
You can view the member list for a space at any time, and send a direct message to a space member, or remove them from the space if required.
Click on the drop-down arrow to the right of the space name along the top of the screen for options to view members, add members, rename the space or turn off notifications of new messages in the space.
Choose View members to list all space members.
Position the mouse over a member to view options to send them a direct message, or to remove them from the space.
If you choose to remove someone from the speace, you will not be asked to confirm this action. However, you can add them back again if required.