If you work in downtown SF, use this $25 Gift Certificate to check out Darn Good Food on Kearny and Bush. They offer low calorie breakfasts, organic lunches, and hearty dinners that are speedy but don't skimp on the quality. All of their beef is locally sourced, their veggies are fresh and seasonal, and they offer vegetarian, gluten-free and dairy-free options to fit every lifestyle. Eat-in only, please.