(The answer to that is basically everywhere, those of you who have met me in person can safely confirm that, I'm sure.)
Here's my blog hop: what is the bathroom at your barn like?
Here's my current barn.
It's basically a composting toilet aka a fancy outhouse. It gets drained from time to time. On the shelf above, anti-bacterial handwash, monkey butt powder, lysol spray, and toilet paper. To the right, a mirror.
Look to the left of the toilet: yup, that's daylight. So not heated. On the very coldest of days, it's pretty unpleasant.
It's not fancy, but it works. It rarely smells. It's kept clean and neat. I've used many an outhouse in my life (I was a Girl Scout for a looooooong time) and this is vastly superior to all of them.
Every barn I've ever been at in Vermont has not had running water in the bathroom. My first barn had a porta potty outside, and if you don't think the wind would come through that thing whoo boy. Never have I ever peed faster.
I have only experienced a flush toilet and running water at one barn, my one previous to this one. It was kind of glorious. After a 1.5 - 2 hour commute to get there, it was a lifesaver.
What about you?