I live in a fairly big city, too, and went to a meeting and there wasn't just one co-worker there, but five! I was so embarrassed and worried about what they would think and say. You know what, nothing happened. They didn't run back to work and tell everyone and only one of them actually ever mentioned it to me and that was to offer help if I needed it.
I think people really in these meetings to get better and they have enough on their plates with themselves. The ones that are doing really well with the program understand what is going on and will be there to help.
Good luck to you! I hope you find meetings that you are comfortable with. :-)