You meet people everywhere, Recoleta or ghettos, Cafes, markets, streets. Some of the people in this forum met their wives in stores. One time I was looking at the real estate photos on Santa Fe, a lovely lady was also looking at the photos there, I asked her couple of questions, she started to offer to find me an apt, she is not in real estate business. Another time I was running in Recoleta, saw a young women from UK looking at the fresh empanadas, I told her that there was a better store nearby, she started to ask more questions, at the end of the conversation, she said she and her fiance would like to invite me for dinner so I could tell him the same stories again. I told him not to invest in Argentina, later we became friends, and they bought real estate in Malta, and I visited them in Malta. I am an Asian guy in my 50s, speak almost zero Castillano, I met so many people in BsAs from different places that each time I visited Argentina, I was never able to get out city of Buenos Aires, there are always people to hangout in the city. You just have to say hi to people and Argies love to talk to foreigners in general. Later, I visited some part of Europe more often, same. If you are visiting Thailand or Vietnam, you literally can meet people in malls, stores, streets, restaurants, dance clubs, parks, schools. Very different from US. You might be just an average Joe from Santa Clara California, but can be an interesting man in BsAs or Sant Petersburg Russia, just like this guy
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https://en.wikipedia.org/wiki/The_Most_Interesting_Man_in_the_World