Smoothie chain granddaddy.
Average cost: <$10
It's the granddaddy of the smoothie chain, and with 10 locations across Chicago, you're sure to find a fruit treat in or near your 'hood. Jamba Juice offers more than enough options to suit your tastes, from berry creations like Razzmatazz and Strawberries Wild to the citrus-esque Orange-A-Peel and Orange Berry Blitz to the just plan sweet, in which case Chocolate Moo'd may be for you. Or yoo'd.
Jamba Juice has 10 boosts you can add to your drink to increase its protein level or load it with vitamins or energy, among other things. Even better, the addition of one boost is complimentary with each smoothie. Huge and tasty, these smoothies are almost too big for just one fruit fan. But then again, that's usually a realization you come to after you're looking down the straw into an empty container. FYI: Jamba also offers two vegan smoothies: Protein Berry Pizzazz and Jamba PowerBoost.
Jamba Juice official website: http://www.jambajuice.com