I think they go play kickball if I remember correctly from their interview w JL.

In elementary school (at least where I grew up) every day we'd have "recess" where we got to go outside for 30 minutes and play sports or play on the monkey bars or whatever.

We go to the park every week to play kick ball. Besides the fresh air, it's a great venue to exchange ideas with other people in the company.

My guess: they get out of the office together and go do something fun?

sidenote: I wanted to do some "startup field day" event for Charity in the valley sometime in the summer.

A paternalistic employer.