You can add anyone on your Amazon Chime contacts list to a chat room. By default, all members can send messages, and read all sent messages.
To add room members
In the sidebar, open the chat room.
Choose the ellipsis menu located to the right of the chat room name, then choose Add members.
In the Add members to room name dialog box, select the contacts that you want to add.
Choose Add.
Amazon Chime notifies the contacts that you add. They can accept or decline the invitation.
