S.G.
Hi S. - I hope what I suggest is not in 'competition' with Mamasource but there is a Lower Bucks "meetup" Moms group that is constantly doing things - I haven't made it to anything yet b/c my daughter is only 8mths and everything is usually during her nap times - start here http://www.meetup.com/topics/ and click under parenting for what your interested in.
Hope that helps
S.