A culturally cool person is one that is diverse and open minded. Large part of the U.S. neighborhoods that have a large mixture of minorities living together and working together have a culturally cool atmosphere. People that are not are very easy to spot, they get uneasy around minorities. Not to say that they are racist it's just they have no experience with people that are different than they are.
Most people living in large college towns are generally culturally cool because they are used to being around
people of color.