2 - both in my current job (and one of whom I worked with at the time too, but he was only a temp so wasn’t expecting him to be around long). The other one I’m still friends with and we flirt sometimes but have never had a repeat. Probably won’t either.
Those 2 are roughly about 1% of my total number of partners. As dale said earlier, gay guys have it much much easier 
Cheer up. Coprophiles are rare, but they’re out there.
Yep, my wife briefly worked for the newspaper I edited out in Oregon. She had a Saturday morning paper route until she found more permanent employment. For two weeks I could brag that I was nailin’ the hot chick in circulation. It wasn’t really that funny, but it made our teen-age son roll his eyes so hard they clicked, and that was pretty awesome.
One. Didn’t end that well…tough to work with him afterward, so it’s not something I’ll repeat again.
I’ve always liked you, GuanoLad.
Two. One was really bad. He made me feel sick all the time, since I got to watch him flirt with our other coworker (with whom he eventually cheated on me). That’s when I started to see what people were talking about when they say not to date your coworkers. It was a call center where everyone dated everyone else all the time so it wasn’t out of the ordinary. That was several years ago, and I am over it now.
You’d think I would have learned after that, but when a coworker I’d had a crush on for months asked me out, and subsequently revealed he’d had a crush on me for over a year, I definitely couldn’t say no! So he turned out to be awesome, and we’re moving in together by the end of September. We work in support, but it’s not a call center, it’s internal. We both work on the same team, though I’m pretty sure he’ll be promoted soon.
I guess technically my wife is sort of a co-worker (we both sing in the same two professional choirs and I sub in her school district), so, one.
just the one, but I too work with my wife.
1
Still ongoing. Seems to be working out quite well.
We are relegated to the “aromatic” corner, though.
Two. The first was a woman I had a crush on for years, then it all seemed to come together in the space of a couple weeks. I was in heaven. I blissfully ignored my co-worker’s warnings (“Stay away from her–she’s just using you!”). They were right…she broke my heart several times in an on-again, off-again drama that lasted several years.
The second time worked out better. Our “romantic” relationship didn’t last, but we’ve been best friends since we broke up 8 years ago.
At the same time?
None.
Opportunitys on the oil rig are a little … limited.
None, kissed one co worker when I was young but that’s as far as it ever went.
I’m willing to bet there are opportunities aplenty, just not ones you want to pursue. 
Let’s see, I am going to count any makeout/ sexual action as one…
I’ve had some sexual action with only…5 different women in my life…wow… Two of them I met at work… Both were bad ideas.
Which is now awkward because we used to work together.
Slept with none, but did some kissing and groping with a couple of them. The last one was when I was in college still, and if the workplace hadn’t closed down about 6 months later it could have been bad in the long term. She got jealous of the girlfriend I met a few weeks after our last make-out session. That, and since she was married with kids it could have turned into a very bad situation.
I would avoid doing anything with anyone I work with now. Besides which, I’m married, so I’ve got another very strong incentive not to do anything stupid.
Just one! Had to marry the boy, make an honest man out of him and all
I’m waiting to hear what Qadgop the Mercotan and Little Nemo have to say.
As for myself: none. I’ve got a huge blind spot about things like that–even before I was married, most of the time it never would even have crossed my mind to ask a coworker out, for some reason.