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.