GET OUT OF THE CAPITAL! Not to stereotype anyone, but in the capital, the woman are very complicated. As you get further away from the capital, they are less complicated. I am a huge guy, 6'4" 330lbs, not your super goodlooking or nice body, and I have never had a problem with the argentines, but again, I lived my first year here in Pto. Iguazu. Very far away from the capital! Later I lived in Tigre for 2 years and during that time, it was a lot more complicated. Steveinbsas has a lot of good advise, listen to him. I don't know how old you are or the other members, but I am 39 and I have never met an argentine girl that liked to dance Tango, then again, my time in the Capital was limited. Maybe Tango is for older women, I really cant give advise on the Tango. The last thing I wanted to mention is Argentine women that you find in Pto Madero or other High Class areas or clubs are looking for money or have money. That makes it alot harder. Find places where the super rich don't go. Mix with the typical argentines, not the rich or thoes exposed to expats all the time. You will have better results. Good luck and get out there and get you some women.
Mike