For downtown loft-dwellers, Washington Ave Post may be best known as a coffee shop and office-supply store rolled into one. But discerning customers know Washington Ave Post for its out-of-this-world smoothies. The store offers traditional smoothies made from frozen yogurt, power shakes fueled with skim milk and mellow green-tea blends that provide a subtle kick of caffeine. Washington Ave Post makes its fruit purées on-site, with flavors including raspberry, blueberry, orange juice, blueberry and banana. Not interested in a smoothie? The store also makes decadent ice-cream milkshakes using many of the same ingredients.