If I was still working and you came up to me and asked me that question I would tell you not to put your dip stick into the company oil well! You are playing with fire when you date co-workers. If things don't work out you will see this person everyday. If things get serious, there are those who may hit on your significant other and this will not set well with you.
Workplace violence cases seemed to more times than not, revolve around some romance situation or triangle.
... and then there is the sexual harassment that could hang over your head. Supervisors are real vulnerable to this. Chances are it will be harder to do your job!
Do I need to go on?
My final comment would be (if you were one of my supervisors) don't let me catch you dating anyone in my operation.