The Pennsylvania Jazz Society hosts wonderful jazz events each month especially aimed at young people (attendance for students with ID is free), featuring a live band and plenty of space to dance.
The fabulous cornetist Danny Tobias and his Famous Orchestra, comprising the incredible Scott Robinson on reeds, bassman Ed Wise on acoustic bass, and the legendary Marty Grosz on guitar, entertained an appreciative audience and dancers.
For more information about the society, see:
http://www.pajazzsociety.org/