BPH
Master Don Juan
All you have to do is wait until somebody makes it easy for you. By "easy" I mean a legitimate invite somewhere else, outside of work hours, ideally alone or with a small handful of friends.What is the long game to you? Because if I don't up the ante at some point, they'll just lose interest and move on, single or not.
I'll give you an actual example, even though it's not the most transferable to your situation:
I was piss-drunk one night out with a friend a couple of years back. It was nearing closing time, and my friend pulled me over and told me this girl sitting next to him thinks I'm hot, and that I should talk to her.
I was so drunk that I peeked past him and saw her sitting down, but couldn't get much of an idea how she looked, so I drunkenly said, "I can't tell, is she hot?"
I was loud enough for her to overhear me, she laughed and responded, "Yes, I'm hot".
We ended up Ubering to her place shortly afterwards, and I banged her out a couple of times.
Like really don't jump on these women at your workplace unless you're absolutely certain she's giving you a lay-up.