On Saturday, April 28th the Philadelphia Big Brothers/Big Sisters threw its 7th Big City Ball at the spacious and swank-ified 30th Street Station. Oz and the Emerald City was the theme and several technicolor costumes were spotted throughout the evening. Over 1,200 people came to support Big Brothers/Big Sisters by bidding on auction items and buying raffle tickets. Bistro St. Tropez provided a sumptuous buffet, followed by desserts from Denise's Delicacies. To find out more about Big Brothers/Big Sisters, call 215-557-8600.