June 2012. Technology Conference at a convention center around lunchtime. Line outside men's restroom.
Many years ago, I was at Disneyland. Noticed a long, winding line next to some rides, so (not realizing it was the women's restroom line) I asked the woman at the end of the line what ride the line was for! Lol.
I guess I should have asked a little more discretely to avoid all those looks they gave me.