Welcome to the forums.
MrS and I lived in "Filthy-delphia" for several years. (I'm not a city girl...we moved away when I was done with school.)
One of my long-time FWBs lives in Philly as does my best friend - so I try to swing through once a year or so.
The 2012 Poly Living Conference
was held in Philly in Feb this year - one of these years I might actually get around to going...