Often when I go to clubs I'll notice girls give me good eye contact and/or smiling when I catch their gaze. However, when I go over to dance with them, more often than not, they reject me. Is this because they don't find me attractive up close? Are they just looking for attention? Do they not want to dance because they're with their friends? I realise this is a very broad question that would change from girl to girl, but I'm just surprised how often it happens considering they're giving what seems to me as a green light.