Maybe yes, maybe no. I'm not exactly sure how it worked in Buenos Aires in the old days. Men learned from one another at the time primarily because there was no professional cadre of teachers around to instruct them and no formalized instructional system as there is today. Not to mention the roving bands of performers who give workshops around the world. Also, what transpired back them, at least in my understanding, is that younger/inexperienced dancers learned from older and more experienced male dancers. That doesn't happen today. In a co-ed group, an experienced dancer is going to practice with his partner (generally, also experienced), or an attractive beginner. Generally, you find the inexperienced dancing with one another. It's difficult to learn in those situations because there is no one to guide you. At such times a teacher can be very helpful. What I found very useful and would like to do more of was to rent a practice room and practice *alone* with a partner, just the two of us. Bring music and work on stuff. You can make as many mistakes as you like. Nobody will care but you two. Costs a bit more than a practica but you can focus more sharply on what needs to get done.