The culture is... varied. If you're patient and lucky, you can find whatever you're looking for. Be polite, and clear, and you shouldn't ever have any problems.
I started on the One Shot Stories section. You can browse through the Classifieds there, and see if there's anything you are interested in. If not, you can post one yourself. There are similar boards in all the sections, like the one this post is in.
And remember, if you don't ask, then nobody will ever know if you want to play! Take a chance. The worst that will happen is somebody will tell you they aren't looking for that right now.