I did once but after I resigned from the office.  
I had the hots for him and we did it everywhere in the office.  
I completed that one and checked off on my bucket list. Lol.  

...since I work 'alone.'  (lol)  :P

In my single days.  Many moons ago.  That was a lot of fun.  I wasn't much good at work the next day.  I kept falling asleep.  Lol

A little fooling around, but to say, not to dip my pen in the company ink well.
Not to say I haven't been seriously tempted....
Too many HR landmines out there.

3 co-workers shortly after I got divorced.  one was in my department, the other in a different one, and the 3rd at a different school who had been at my school.   unfortunately, they were all looking to get remarried and I was not.  so, the affairs did not last long, but the sex was great.

She was a co-worker from Georgia, I think.  I got to know her over the phone and emails from doing IT support.  She came into SoCal for work and we hung out and i showed her the town (with her hotter co-worker that I also knew) and I ended up staying in her hotel room.  Making out and what not and FIV.  It was fun.  Wasn't expecting it.  Would have preferred the other one though!  But, she insisted that I not come into her adjoining room.  Ha!

Proving conclusively that I'm a fucking idiot. There were at least two women I worked with when I first moved to LA who practically threw themselves at me.  Both at least 8s. Still kicking myself 30 years later.

You didn't answer my last question.  

When I was a server in college can only think of a couple of my female hottie servers I didn't to it with. Memories

I was on Madison Avenue in the early 80's. So yes. We were all at each other. The closed door of an office was often the tell. Client presentations in other cities. Location shoots. Editing suites. You name it.  

before suing over sexual harassment became fashionable after she finds out its just playtime and you're not going to give her a future.  Funny how quickly they want promises, and when you say no, its revenge time.  

Sure have.  Once in the office in the lactation room during office hours.  We were quiet but it was kind of a thrill worrying if we would get caught...

I married her. Don’t do it fellas!!!