I still find the Swiss thing for informality a little ... well, informal.

Last night I went out for a drink with a colleague.
When we got to the pub there was standing room only, so we stood and drank our beer. While we were standing there, a group of musicians entered and plagued us for fifteen minutes with some Spanish (I think) music then a guy came in and tried to sell us some roses - pretty much a normal night at the pub ...

A table emptied except for one guy. We asked if it was o.k. to sit with him and he gestured his assent. We sat and after a few minutes, two young women came to the table and asked, if it was o.k. to sit down too. We nodded. They sat.

Then one of them proffered a hand and said
'Ich bin Martina'.
'Well, yes uuhm, I'm Rob.'
'Hi, I'm Simone.' (Pronounced almost like Simon - the way only the Swiss can).
'Uuhm - Pleased to meet you - Rob.'

So we spent the evening chatting and drinking ...

But if you call that informal ...
At some point after the third beer, I felt the call of nature.
I ascended the stairs and entered the men's toilets. I swear it was the men's - there was a guy standing in the corner, doing what men do, when they stand at that sort of receptacle. As it was the only one, I waited.
The door to the toilet cubicle opened and out came a woman. The woman called out to someone waiting in the corridor.
'It's vacant'.
Another woman entered the room and the cubicle was quickly re-engaged!

After I was finished, I double-checked.
(The cubicle had changed bums hands once again - another woman)
On the door was a picture of a male in bathing trunks, the door next to it had a female in a bathing suit. The cubicles in there looked vacant to me.

I could only shake my head at how informal the Swiss really can be.