I remember a business trip to Japan where a restaurant had a co-ed bathroom but both at the same time! I'm standing at a urinal when a woman walked right behind me and went to a stall! Needless to say I left thinking I went to the wrong bathroom and was a little embarrassed. WAIT, women's bathrooms don't have urinals!
*Punkin on the run*
Fortunately, ours is a single. The upstairs ones anyway. We also have both a mens and ladies room downstairs with stalls, but nobody wants to trek that far when they have to go.