If you are under 22 and working a throw away job then have at it.
Otherwise, date outside the workpace. Don't jeopardize your career for p*ssy. I've seen it when the chick gets into trouble, and especially if the guy held a higher ranking poaition, she leveraged that by saying he used his position of authroity to intimidate her into sexual relations (or she had to give it up to get a promotion).
It ain't worth it.