Working with partners and clients one thing that is often asked for is a demo of an Office 365 intranet.
Showing one for a live client can be problematic as they often contain confidential data.
Well so long as you are enrolled as a Microsoft Partner you can spin up a Contoso demo at https://demos.microsoft.com
This is available even to Network partners so enrolment requirements are not onerous.
The site gives a good idea of what SharePoint looks like with publishing enabled, is responsive and has some nice demos of display templates.
Alternatively your can request access credentials to our online, self drive SharePoint demo.