Your coworkers are people you see practically everyday. Heck you might even hang out outside of work too. The reality of it is, you already have some sort of common ground with these people because you're dealing with similar work situations and can bond over the same stress your work might bring.
It is easy to see how dating at the work place can come to be. It has it's benefits but it most definitely has it's downsides too. "What if it doesn't work out and I have to see this person EVERYDAY??"
MeetMindful.com already did the work for you to help weigh out the Pro's & Con's: Dating a Coworker