Girls bars are basically bars for guys.
Yes. That makes sense. They are bars staffed by girls chosen for their looks. They pour drinks, they make small talk and they let the patrons hit on them and make them think they have a chance. They are not quite the same as hostess clubs but I have never been to one of the latter so I cannot say how :p
Regardless This particular one in Kabukicho has a rather EPIC name.
I think I managed to snap one of the staff in the alley around the corner.