Interesting concept. The treehouse playground looks awesome and like a lot of fun. The BBQ smells amazing but I didn't try it ;-)
The lemon shakeup place had great refreshing lemonade, which you need because somehow the heat rattles rains all the metal containers and whatever the paving is made of (not concrete) and makes it super hot in the courtyard. Good thing there are couches and tables in the shade and a fairly big grassy lawn to sit on and watch live music which they have throughout the day.
Good place to bring kids downtown but nothing too special for adults.