Showing up to a party wearing the same dress as someone else is not something any girl would like. Some of them would probably freak out and leave, but not these women. They were thrilled to go out like this and in a second you are about to see why.
These girls are performing a strange dance called Strumpfhosentanz. As you have probably guessed it’s a German dance, and it creates a dizzying optical illusion. When the group starts dancing, magic happens! No matter how much you try, I bet you won’t be able to assign the correct arms and legs to each of the dancers.