There are several things you have to look at in this. First she went from a one on one discussion with a man to from the sounds of it being swarmed. That would be enough to make anyone "body laungage" change. It could be they made her uncomfortable and she took a defensive posture.
Second what attracts an individual to another could be anything. It is a preference. I am not phyiscally attracted to very dark skinned women, does not matter if they are Black, Indian, middle eastern or an over nuked fake tan blone. I love small round face women, and specially asian women, but again that is preference not racism. I prefer redhead and darkheaded women over blonde but I don't discrimminate agains blondes.
If the color of their skin cause me to treat them different than I treat anyone else then that would be racism in my book. Racism is very much alive in Americal today. If you are a christian white male you are the most discromminated against person in this country!