rbistolfi: two things
1) Now I feel the urge to learn about Beunos Aires, about which I know little.
2) You mentioned black people, so I'll tell you something about St. Louis you probably don't know. If you're ever on the bus in St. Louis, feel free to talk to the black people. Almost all of them are going to work, school, the doctor, the grocery store, etc., or going home from one of those places. DO NOT talk to the white people on the bus. Very many of them are one or more of the following: on drugs, mentally ill and off their medication, looking for a fight, sexual predators, and so on. This has changed a little since gasoline prices are so high now, but not much. I use public transportation a lot, but most white people here don't. They drive their cars and sport utility vehicles or whatever, and leave public transport for "those people."
I'm white and I endorse this message.