If you ever get a chance try and go for the week before Lent, and on Dirty Thursday, to somewhere like Luzern. The entire city is in fancy dress, especially the WG. I was there this year , and in one of the several pick up bars, was approached by Marge Simpson, Cat Women, Minnie Mouse, Hiawatha a ,cowgirl , a lady pirate, and a police women. And because it was fancy dress for all, nobody looked out of place.
I had already met the girl dressed as cat women a few days earlier, and nearly died when this cat women called me over by name, even took me for a drink. Crazy time and place.