That's one of the easiest place to find as any building has a stair case.
The most exciting part is to hear a door open, footsteps getting closer while you are sucming or riding a delicious cock.
We often meet during the day in some close by building with Paul for a quickie or some task.
He lives to ask me to strip and to walk from floor X to floor y.
Again make sure you are safe at any time!