The Basement
The two men land on a third story balcony inside the main building. From there, they search the building for clues as to where any useful computer tech might be. One particular lab/warehouse section of the building looks promising for the symposium. A consultation with a faded physical map shows the route there to be simple enough.
A simple problem presents itself in the form of a gaping chasm across to where the hallway resumes. During the time this building has been down here, a structural failure due to some unknown cause created a huge collapse through the center of the building. A testament to the engineers of that time, the collapse is only fifty meters across. The gap explains how the relighast got it and also provides a way out that isn't the sewers.
Another use of the flight gear takes the two across the gap. As they fly over, the relighast appears again and roars at them, but otherwise leaves them alone. Fifteen minutes later they hit pay dirt. The warehouse is indeed the location of the symposium. It has a relatively sealed environment and the dry air coupled with that has resulted in a number of skeletons scattered around. Whatever happened here, people ended up trapped inside. Three skeletons lie on the floor near the door, one pushed out of the way when it opened. That one is partially crumbled into dust now. Others are just sitting in ancient chairs, splayed out as if they fell asleep there and never woke.
The good news is, there is technology everywhere. Computer systems, droids, all manner of cybernetics and other tech. There are even some things that look like they might be weapons. Over in one section there is a sign in archaic language of Core...Corellia that says "ship systems".