I have had men wiser than I (namely Tom Leykis) say 'Don't fish off the company pier'...Words to live by, I haven't seen a co-worker naked in years. Saves a lot of potential headache.
He has also said 'Interactions with women at work should be "Good morning" "May I have that pen, please?" And "good night", that's it' This one I did not take so seriously, and now I know it was not smart.
There is a woman that works in the same building as I do, and we have a lot of interactions. Usually fun, communicating about patients, or a good natured story about the weekend. We would hang out outside of work in a group. She texted a few weeks ago to 'hang out' just she and I, I said fine. We went out to eat, drink, then watched a movie at my place. Seperate couches, no touching. She is attractive enough, expired though. 40+. Holds it together OK, but does look 40+. I will not bang a work chick again. I do not want to bang this chick.
So, it turns out that paying her attention in the outside world is biting me in the ass. As many women do, she is attempting to monopolize much of my time. Recent texts involve "Hellooo? Lol hanging out with a girl tonight?" And "You don't like me much do you? I am always the one to ask you to hang out" when I don't respond for 30 minutes I get "yep, I knew it, you hate me" and " I see, you move to your fancy new apartment and now you don't have time for me anymore, lol, whatever"

To emphasize, I have not seen this girl naked, and do not want to. I'm getting shit tests from a girl for simply paying attention to her outside of work.
I respond to the texts with desire to not escalate the situation, but I usually respond with some non-serious answer 'I hate sardines' or 'why was 6 afraid of 7?' By not taking the tests seriously, I think I am passing them...but I don't want to pass them. I want the whole thing to go away. It was a bad idea to meet opposite sex members outside of work, proving yet again 'friends' between sexes is a joke.

Hanging out with chicks from work in any way is a recipie for disaster, once again Tom Leykis was correct.