The most gorgeous girls of South America are located in Buenos Aires. Why don't you just take a look at badoo and make a quick search for regular argentinian girls in that city, you will soon find out what Im talking about.
You've got much higher chances of hooking up with girls at bars if you are european or any other developed english speaking country. I know it sounds silly but somehow girls down here see anglo-males as superior.
Now, if you are out of luck and need to pay to get laid, you can get a premium escort for 50 dollars an hour, and I mean premium.
PM me for more info.