Underneath, where one of the restaurants is going to be, there used to be a speakeasy with a secret entrance
“I think we’re gonna reactivate it,” explains Blumenfeld. “So there was a secret entrance that is now covered over on Broad Street that takes you right down into the lower level.
http://philadelphia.cbslocal.com/2014/07/14/philadelphia-hotel-about-to-undergo-serious-renovations/