In classes and workshops, dual-role dancing is obviously a solution because you can increase the capacity. If you register without a partner and constantly rotate, this is more or less implicitly the case, earlier or later. But in neck of the woods, people mostly register with a partner, mainly to keep the level of inconvenience when learning to a minimum.
And so a friend recently asked me if I wanted to attend a drop-in class with him, maybe dual-role, as he hadn't found a lady.
I found that quite funny, because in my opinion he is the most sought-after leader in town. And I suspect at least one of the women he asked also took part in a female couple. The lesson itself was also quite entertaining, and we weren't any worse than the unmusical average. A female friend who has access to a suited location is soon hiring a teacher for a private workshop weekend. I strongly suspect that she will test whether she can already lead me, while I can hardly follow.
And this is not limited to the learning context, I have also experienced this at milongas. This is far too attractive for women, if they are allowed to at least try it for half a song, they seem to be really happy.