Google is in the process of rolling out some improvements to Google Chat that affect Spaces. Space creators are now able to delegate the manager role to other users.
Not only can they ensure that everyone behaves properly in chats, but they can also set descriptions for spaces that clarify the purpose, etc.
Furthermore, rules for spaces can be described so that the members know exactly how to behave. These changes will be distributed immediately, affect all chat users and should be available to everyone by mid-March.