There are all kinds of ways to rock it. Whether they're rocking chairs on the front porch, driving rock buggies through dunes or scaling the sides of craggy cliffs, these rocking get-togethers all have one thing in common: they're able to organize via Facebook Groups. No matter how you rock, the social network celebrates the buggy rollers, rocketeers, porch loungers and everything in between. Not to mention the rock of the hour: Chris Rock, who leads a hoard of ambitious athletes in ascending the front steps of the Philadelphia Museum of Art a la Rocky Balboa. Who else would you expect, Sylvester Stallone himself? Well... he's there too, letting people know that there's a Facebook Group for whatever you rock.