Dance with who you feel comfortable with. At the milonga, the concept of women and men being friends like we are friends with men here in the States, is not customary in Buenos Aires. So a certain amount of behavior adjustment on a single woman s part might be applied. It mainly has to do with acting a little more formal. Leave the fringe, low cut and slit dresses at home.
Clothing here does send a message.
Argentine men can be great dancers, can have impeccable manners as only South Americans can have, be charming, intelligent, attentive, romantic and sexy. They also can easily assume more of a message than you intend. Traditional role playing runs deep here. Of course, if you re taking the kind of recreational holiday that includes more than just dancing and socializing, by all means disregard all of the above advice. You might wonder how I come by this completely subjective information.