Groups of Girls Walking (from the front)
 

Any state of dress. I think these are a really nice type of street photography, where you can see a bunch of people going on their way with different expressions & body language. Good snapshot of a city & people.

That's groups in a broad sense. First pic, they're together so they're playing off each other. But the second pic, they're clearly not together, which is great cause they're all lost in their own thoughts and behaving differently.