In Singapore this week, hugging a Coca-Cola vending machine will get you a free soda. No, it’s not a sudden outreach from the robots we’ve created. It’s part of a campaign started by Coca-Cola called, appropriately, the ‘Open Happiness’ campaign. It’s not the weirdest campaign Coca-Cola’s taken on and it certainly doesn’t trump Pepsi’s social networking vending machines. Still, it’s raising eyebrows and bringing a little joy all over Singapore.