Hmm, what kind of plot could a rp set in an inn have? I was going to say think about what you see in your local bars, but then it occurred to me you might be too young to go in them. Basically, you get a bunch of people drinking, relaxing and talking
complete and utter balls. Legendary tall tales - that either never happened, or if they did it was done by someone else, with the teller merely taking the credit. That gives characters all sorts of free reign for exploration, and if you think back to in game books in Morrowind especially, how many of them had some legendary figures meeting in bars? One is springing to mind immediately, "Silence" the Illusion skill book.
The setting of a bar has loads of potential, and you have all the oppurtunity in the world to play around with it, and see what you can come up with. From laid back converations, to drinking games, to tall tale contests, to the latest curious fellow who strolls threough the door in search of liquid refreshment...loads you could work with. I also feel that if the two line posts stopped, and people had the courtesy to run their post through a spelling and grammar check
before they posted, you might get the rest of the forum off your back, and some of them might even join themselves. There is always a place for a more laid back rp, it doesn't always have to be saving the world, or hunting the necromancers, or surviving hordes of undead. But you do have to take pride in your posts, not just press add reply to any old rubbish.
Stick with it, and improve it, just be more careful and more creative. You'll feel better about what you've written, the rp itself will be more successful and the world will be a happier, shinier place! (Possibly.)