Or does it matter how you phrase it?
"Lets get a drink together sometime."
Does this imply you just want to get drinks and enjoy each other's company. Meaning, she pays for her drinks?
"Let me take you out for a drink sometime"
This sounds like you're asking her out on a date, where you'd be expected to buy her drinks. Am I right?
However, would some girls still expect a free ticket regardless of how its worded?