And San Francisco is poised to become the first city to ban the high-calorie children’s “Happy Meal” served at the McDonald’s fast-food chain. The San Francisco Board of Supervisors has voted to bar restaurants from giving toys with meals containing excessive fat and sugar. Under the rule, restaurants would also have to serve fruits and vegetables alongside any meals with toys. The measure awaits a full vote next week. It would go into effect as early as December 2011.