If Ballroom Dancing is what you want:

The Stardust Ballroom in Pennsauken, NJ on Friday nights.
Follow the link below for more info.
http://www.stardustnights.net

The Paso Doble Ballroom in Levittown, PA on Friday and Saturday Nights.
Follow the link below for more info.
http://www.pasodobleballroom.com

The Swingalongs Dance Club, Inc. in Perkasie, PA on 2nd Saturday of the Month.
Click here for more info.

The Fiesta Dance Club in Broomall, PA every Wednesday Night
Congregation Beth El Ner Tamid, 715 Paxon Hollow Road
Lesson 8-9 PM - Dance 9-11 PM
 $5.00/member and $6.00/non member (Lesson & Dance)
Open to the public
Instruction on one dance will be covered each month

If Latin Dancing is what you want:

The Stardust Ballroom in Pennsauken, NJ on Friday nights or Salsa nights on the 2nd and 4th Saturdays.
Follow the link below for more info.
http://www.stardustnights.net

The Paso Doble Ballroom in Levittown, PA on Friday and Saturday Nights.
Follow the link below for more info.
http://www.pasodobleballroom.com

The Fiesta Dance Club in Broomall, PA every Wednesday Night
Congregation Beth El Ner Tamid, 715 Paxon Hollow Road
Lesson 8-9 PM - Dance 9-11 PM
 $5.00/member and $6.00/non member (Lesson & Dance)
Open to the public
Instruction on one dance will be covered each month

If Swing Dancing is what you want:

The Philadelphia Swing Dance Society in Philadelphia, PA on Saturdays 2 times a month.
Follow the link below for more info.
http://www.swingdance.org

If Country Dancing is what you want:

Montana West in Quakertown, PA on Wednesdays and Saturdays.
Follow the link below for more info.
http://www.clubmontanawest.com