So I was out all day approaching today at the mall and I noticed that it is pretty hard to find single girls walking by themselves.

I've gotten pretty good at approaching and number closing single walking girls. Its easy to be direct with just one girl standing in front of you but how do you about approaching a girl with her friend?

It seems like 90% of cute girls I see in public places are always with a friend so how do you approach and number close the one you're interested in?