if a guy wants attention from those type of girls you gotta catch them off guard when they're separated from the pack, cuz when they alone they don't have to front in front of their friends. When they're alone going to the bathroom (which is rare I know they travel in packs) or outside for some fresh air or whatever (also rare they would be alone) but these your best chances, it's worked for me a lot of times.
but yea most of those girls really need to get