Except that genetics are an integral part of race. You make your attraction decisions by basically smelling their genes via their phermones, and that helps you to determine attraction. That’s the nature part of it. The nurture part is the cultural component of race, which helps you decide if you like big asses or little ones, big lips or thin lips, rounder face or more angular face. So attraction and race cannot be seperated. People don’t come piecemeal, they are full people that are the blending of all characteristics into a seemless whole.
It is perfectly fine to discriminate based upon race, because there are genetic and cultural reasons as to why you do not feel a kinship with that person. The racism that we try to combat, and lose sight of once in a while, is the irrational fear of someone who is only superficially different.
Judging someone as different from oneself is a different thing from judging them as a threat to oneself because of those differences.
Class is definitely a part of it, poor people don’t tip well, which is actually a shame, because waitstaff is a job generally held by the poor, and if those people tipped well, the waitstaff would have more money to spend in the community, and as money is spent more freely, it cycles through the community faster creating in effect, more money. So if a particular race is part of a particular class in your area, then that says something about them, and if your experience shows that it is not isolated, then making a cultural inference about your particular data set, is far from unreasonable.
Erek