Several over the course of the past decade and a half or so. Most of them have either stuck with it or would have given time and opportunity. Currently working on my fiancee so that she won't be jealous of me spending time with her friends (who were my friends before I met her but were her friends first) while she stays home.
To my shame, I have not. I'm afraid I haven't really got any prospects for conversion. I think my whole circle of friends has at least some amount of past experience with roleplaying.