I'm normally open about being in therapy. My family all know and my colleagues (psychotherapists or trainee psychotherapists) are in therapy or have been or are thinking about therapy too (it's even a training requirement in order to become a therapist). I don't normally tell people who my therapist is. But recently I've joined a group of non-therapists (studying a couple foreign languages as a hobby) and I haven't told them about my therapy. For me, being in therapy is so natural, but I realize that to others who don't know as much about therapy it may sound unusual. If someone I like and trust in this group asked me about it, I would tell. I'm not trying to hide it but I'm not telling it without being asked, either. It's my personal space and I only tell when that information is welcome and likely to be understood.