Philly Free Skate is this coming Friday - Sunday (6/18/10 - 6/20/10).
Details: http://www.phillyfreeskate.org/
Still rooms ($122 per night, includes taxes and fees) available at the event hotel, Best Western Center City, from kayak dot com:
http://www.kayak.com/r/VNBfBj
Cheers,
George