Dancing Meatballs
What it is
Dancing Meatballs is a free newsletter and website geared towards parents living in major cities.
Pros
I'm impressed by the amount of fun activities and finds that are on the site for each week.
Cons
I didn't see many activities for children older than 10 or so, so the site seems to aim for younger children.
Philly Connection
You can choose from 2 cities - Chicago or Philadelphia. And the site is run by Wharton grads.
What you can learn from it
Definitely sign up for the newsletter and learn about fun places to go.