For those of you who don't know:

In literature, the term "round-robin" refers to stories written by multiple authors who exchange the manuscript beween themselves and take turns adding to it a little bit at a time.

Basically, a really simple form of collaboration where the authors write in ... well, rounds. Little bursts of writing that can be as long or short as you please, before passing it on to someone else and letting them do what they will with it.

Anyone can join the group or take part in the collaborations, so don't feel the need to ask permission. All you have to do is either post a prompt of your own in a new thread or contribute to a pre-existing thread. Anyone can add anything they want to any of the ongoing stories at any time, so you can pretty much write anything you want, making it as serious or silly as you like.

The catch is, you have no control over the direction anyone else may decide to take a story and you'll just have to deal with it if you don't like it much. That's part of the fun; seeing what kind of crazy, nonsensical ponyfic we come up with once everyone on the internet has taken a shot at writing part of it.

The only real rule is that you can't post twice in a row. Once you post your addition to an ongoing story, you have to wait for someone else to add something new before you can add anything new yourself.

Have fun!