Okayy, so you're going to need a wingman for this one. Basically you go up to a group of more than two girls in a local mall or place where groups of chicks gather. Make a good bit of eye contact and then walk over to them and say, "could you do us a favour and settle this argument?" theyll be like "okay" and then just say "were are yous from because I think yous look like girls from ... but my friend disagrees and says yous look like you're from ... " This then opens up a lot of conversation starters about where yous live and where they live etc and you can use techniques and negs etc that work well withing groups