HIIT Rooftop Fitness at Whole Foods Lincoln Park

I love to eat, which means, I NEED to work out. Fitness is super important. The other day I went to my building's small gym and was devastated to find that they're remodeling. Which means they're close for an entire month. SO SAD! But I was only sad for a minute because I know there are tons of other ways to get a workout in around this city. Many ways which are free.

Case in point: flyer above and details in link.

Will you be there? Do you know where else I can get a free workout in? Aside from that yoga at Lululemon and running in the city, I'm also thinking about getting Classpass. Thoughts?