(Image source: gourmetmarketing.net) OpenTable Inc (NASDAQ:OPEN), the restaurant reservation site was upgraded from sell to neutral by Citigroup Inc (NYSE:C). The price target was raised to $74 a share from $68. With the U.S. economy improving, people will have more money to dine out. In addition, according to Citi, the marketing expense from OpenTable will not have a huge effect on downside effect on earnings. Shares of OpenTable are 3 percent on the upgrade.