I'd go even further to say there are no accessible pc's onboard. The Internet Cafe stations consist of a LCD monitor, keyboard, mouse, headphones, and webcam.
The extra memory card is the best option, if that's all you need to do; it is almost impossible for the memory to go bad. I have never had one go bad and I have left pictures on some for a very long time.
If you're really worried but still don't want to bring a notebook along, there is a device from Iomega called a PhotoZip that will read them off the memory card onto standard Zip disks.
Or, you can bring along a notebook if you want.