Before you order a drink in public, you should read this! Seven New York City bartenders were asked if they could nail a woman's personality based on what she drinks.
Though interviewed separately, they concurred on almost all counts.
The results:

Drink: Beer
Personality: Causal, low-maintenance; down to earth.
Your Approach: Challenge her to a game of pool.

Drink: Blender Drinks
Personality: Flaky, whiny, annoying; a pain in the ass.
Your Approach: Avoid her, unless you want to be her cabana boy.

Drink: Mixed Drinks
Personality: Older, more refined, high maintenance, has very picky taste; knows EXACTLY what she wants.
Your Approach: You won't have to approach her. If she's
interested,she'll send YOU a drink.

Drink: Wine (does not include White Zinfandel)
Personality: Conservative and classy; sophisticated yet giggles.
Your Approach: Tell her you love to travel and spend quiet evenings with friends.

Drink: White Zinfandel
Personality: Easy; thinks she is classy and sophisticated, actually, she has NO clue.Your Approach: Make her feel smarter than she is...this should be an easy target.

Drink: Shots
Personality: Likes to hang with frat-boy pals and looking to get totally drunk... and naked.
Your Approach: Easiest hit in the joint. You have been blessed. Nothing to do but wait, however, be careful not to make her mad! Drink: Tequila No explanations required - everyone just KNOWS what happens there.

THEN, there is the MALE addendum ----
The deal with guys is, as always, very simple and clear cut:
Domestic Beer: He's poor and he wants to get laid.
Imported Beer: He likes good beer and wants to get laid.
Wine: He's hoping the wine will give him a sophisticated image to help him get laid.
Whiskey: He doesn't give a damn about anything but getting laid.
Tequila: He's thinking he has a chance to get laid by the
toothless waitress. White Zinfandel: He's gay