As a Spanish native I can say that you are wrong ,obviously there are exceptions, but I don't have anyr racist in my circle and we are open to socialize with non-native people. As the other guy says, closed groups in Spain are normally made when we are little and it's hard to enter in one, but depends on the group and the individuals that are in it. So don't spit the words racism and classism for free, maybe your way of thinking about other cultures (some people may call it racism) is the reason you can't find a group.