The ideal solution is a bike locker.

Even if my bike is stored inside a room, inside the building, I cannot stand it when there isn't some way to lock up my bike. Even if it's with a cheap thing cable lock, I don't like to leave a bike sitting there that someone could just walk off with. Even if I trusted everyone I worked with not to steal it, I wouldn't want someone to "play a joke" and walk it off and hide it somewhere.