Semi-related, and a great way to get practice, check out librivox.org. It is a website where volunteers read books in the public domain, to become audiobooks that anyone can listen to. I did a few way back a long time ago, it was a lot of fun!
So, many many moons ago, when the internet as we know it was in its infancy, there were chat rooms that you could just stumble across. Anyone could jump in.
Some of my favorites were a tavern type setting. People would just make an entrance, just like walking into a bar. If someone's post...