Celebrate the beginning of spring! Mainstream through Challenge 1 dance from 4 to 8 pm with potluck dinner around 5:30 pm. Short walk from Philadelphia 30th Street AMTRAK and SEPTA train station as well as Mega Bus and Bolt Bus stops in Center City. Off-street parking in garages next door and across the street as well as lower cost, open-air parking lot at Sansom and 23rd Streets.