What have these in common?
Well, I find that with my so far limited experience of WordPress, I can write blog posts and update my website with my tablet and the free WiFi connection. Everyone does it of course, so this is nothing new. There is no reason to restrict yourself to blogging in this situation. Creating or maintaining static pages is just as easy, provide you have access to your images and other resource you may need. For this I use drop box, so I can share files between my main PC and the tablet.
By the way, right now I am not in Starbucks or Costa, but in a nice, locally owned coffee shop in Downton, Wiltshire, called the Borough Cafe. You can find them on tripadvisor, of course.