My work life and most of my family - 8 or 9, I just don't discuss too much of my personal life with work but being early 40's, never married and have as much fun as I have in the stories I do share - some may guess or even figure it out.
My inner circle of friends, 1 - they know my lifestyle and many of those who I have shared with have in turn joined me on strip club visits and/or asked for advice on seeing SP's/MP's.
Back to your original question - work associates I become close friends with over time - again 8-9, often shocked at first (always fun telling them) and then most often want to know more, lol.