GuyRule #421.1: Drinking
A guy will never drink "sissy" drinks, no matter how much he likes them, in front of a woman. To do so would be an embarassment and a show of weakness to a woman. Women like to see a guy be a guy in a guy situation.
The only exception will be when someone else buys the drink for him, in which case, the source must be considered. -JayDog