Before opening HummingBird, a Ballard juice bar and restaurant, Keely Fetters was an acupuncturist, an interior decorator, and worked at Gravity Bar (a long-ago, much-beloved juice and vegetarian food spot on Broadway.) HummingBird’s top seller is the refreshing, Kermit-green Sweet Hydration, with ginger, lemon, coconut water, kale, spinach, and pear.