Calorie-Count About.com Health
Calories Burned for Activity: Quiet Standing Quietly (Standing In a Line)

81 calories per hour

Assuming a body weight of: 150 lbs
This is equivalent to eating any of the lines of the following table.

Quantity Description Cals
0.3 Grande Starbucks Caffe Latte - Made with whole milk 260
0.1 McDonald's Big Mac - With cheese 704
1 Glasses of wine (3.5 fl oz) 79
0.3 Snickers Bar 273
0.4 Cans of Coca-Cola 207
2.7 Carrots 30