Slide #2
2. If one girl drops out, the night isn't ruined. We all have those friends - the ones who when 2am rolls around decide they're going to head home because they have a "busy day tomorrow."
But what happens if it's just two of you and you're still rallied to stay out for three more hours? Having a third girl there ensures that you can still have a great time as the two last girls standing (or stumbling, depending on how the night unfolds).