From best of craigslist, NYC:

I have a huge bathroom

I am a female in my mid 60’s and I am looking for a room mate. Times are tight and I need some extra money.

I am willing to rent out my bathroom in my 1 bedroom east village home.

My bathroom is large. You can easily put a twin air mattress in there. I only ask that when I need to use the bathroom, you or your air mattress are not in it.

I do ask that when you are in the apartment, you confine yourself to the bathroom. I do not feel comfortable with a stranger walking around my living room. This might change as I get to know you better.  You may have guest over as long as they are cnfined (sic) to the bathroom as well. This might seem a bit odd but please remember the rent is $400 and the bathroom is large.

Even for $400, I don’t think this woman is getting any takers. I, for one, am happy to spend a little more on an apartment where I have my own bedroom (and bathroom!) and don’t sleep on an air mattress on the floor of someone else’s (large!) bathroom. But who knows, it is New York, and we all know how different the real estate market is there vs. in DC. Or not.