Informedone got this one right off the bat- Electric Tower.  And so did several others.  Not much is known about this interior space located in the building's signature spire.  It may have been used as performance space or for employee meetings.  Does anyone have the details?

The Electric Tower, located at 535 Washington Street, was acquired by Iskalo Development from Niagara Mohawk in 2004. Iskalo has returned the property to its original grandeur, starting with the restoration and reconstruction of the two-story lobby space.  The building was rededicated in August 2007.