To leave a workspace you first need to switch to the "All My Workspaces" view.

"All My Workspaces" view opens.
A confirmation dialog opens prompting you to confirm you want to leave the workspace.
Select "Yes" to leave the workspace.
Notes:
A warning dialog will notify you if you are the only the manager.
Instead of leaving, you will need to delegate Manager permissions to another team member.
See the User Guide: Permissons. section to learn how to assign a team member Manager permissions.
To learn more about workspace features and functionality, see: User Guide: Workspaces.