Awesome question, I am also curious to see what other people social circles are like.
As for me,
Friends I have had for years, and family are the only ones who know I used to practise magic quite a bit. I don't really practise much anymore, I am more of a collector, so with new people I meet I generally will not tell them I used to do magic unless it comes up somehow in a conversation. That being said, people do know I have a card collection, and all of them seem genuinely interested in it. I feel that I still tend to down play the card thing a lot though, mostly because it does not really fit with the other parts of my life and personality. As I have gotten older though, I have become more open with not only my dabbles with playing cards but most areas of my life, probably has something to do with gaining confidence and life experience.