Previous union experience, + or - ?

I'm just starting nursing school in the fall and I had applied for a patient care assistant position at a local hospital. I have no clue if the hospitals around here are unionized or not.... But I brought it up in the interview because of the leadership skills that I learned...dealing with various types of people/cultures, working with management, problem solving skills...that kind of thing. Which, other than that, I don't have any experience with. I was on our executive board for about 2 years and a steward before that....so I brought it up so I could talk about how I would deal with difficult patients/families etc. I do not have any experience with patient care. The person that interviewed me didn't seem to care, but after I questioned myself about it. And I never got a response back from the interview even though we went through my schedule and the whole thing to see what kind of hours I would work (at her request, not mine). So....how do I bring up my experience, without bringing up my work with the union?