There are many things you can do in Buenos Aires. We suggest that you go on a Man Tour. Don't be fooled by the name for the tour is for both men and women. It's a great way to know more about the culture of the people and explore the city's great hidden wonders.
You get to dive the city's whiskey, cigar, beer, and empanadas.
You can also try the Spanglish Exchange. It's basically a speed dating scene where a Spanish and English speakers are paired to practice their speaking skills and maybe hit it off along the way.