Even if you work in a relaxed environment.
Even if you work for an organisation that is all about inclusion and diversity.
Even if you hate first meeting people armed with an agenda and key points to cover, seemingly never getting to know them as people.
Even if you are most relaxed when chatting and building trust through that informality.
You should never have to introduce yourself to someone by saying
“Oh gosh, sorry, are these… they aren’t unisex are they? This is just the ladies toilet isn’t it? I’m just in the wrong one. I’m so sorry. My name’s David – anyway, that’s probably not important right now, I’ll just close this door. Sorry. Looking forward to working with you. Sorry. Terribly sorry. Bye”