I wouldn't hold those places out as the norm. P1 is still one of the hardest doors in Munich, and for that matter I don't recall ever seeing anyone there in Ed Hardy or a football jersey. Costes doesn't really have a door policy and most of the people dressing up are older and or phonies. Hotel de Paris and Jimmy'z is a different story as Monaco in general is all about dressing up and showing off, though I am not sure I would conflate that with "sophistication." This is coming from someone who wears a dress shirt and jacket de rigeur whenever I go out...it is no longer the norm and no one would bar you from entering hotel costes if you dressed down.