I have slim chances of dancing with slim Latinas in Buenos Aires. I know that.
To improve the chances of dancing with slim Latinas outside BsAs, you should start by only going to your preferred tango events where all the women are under 40 years old and there are 2-3 of them to 1 man
Seriously though, you're absolutely entitled to try to get a dance with whoever you want according to whatever personal criteria you impose and I fully support your right to do so, but I don't understand why you describe the layout of a room/venue in hostile terms? Followers are not opponents or enemies. None of us are there (I believe!) to 'win', 'compete' or 'fight'...are we?!