I don't really drink - girl wants to meet for "drinks" what to do? NEED ADVICE!!!!

Whats her number? I will talk to her for ya! Just messing. Just order a beer since you said one is ok with you. After that- switch to whatever you normally drink. Tell her what you said about not drinking much- she may like that. Her last dozen bf's may have been drinkers-they didnt work out.....
Be yourself, if you dont- it will show later. Dont try to impress her- thats where most go wrong. She would be more impressed by you being you.