A single leveled Protectron or sentry bot (depending on level) can be encountered on the ground floor, but the robot is easily avoided by sneaking upstairs. While in the tower, one of the flying Vertibirds may fire a missile through the broken windows. It will fly past the tower first, allowing time to shoot it with a weapon such as the Tesla cannon.
A Nuka-Cola Quantum can be found here by heading to the right immediately after entering. The Nuka-Cola Quantum is located in the second cubicle, underneath the desk.