Guys, what do you expect out of that drink?

ok, recently one of my friends went to london for a study abroad program and she told me about the difference between accepting a drink in a bar or club from a guy here, and accepting one there. apparently its an invitation. a dirty one.

so guys, what do you think your going to get out of that 5 dollar drink, is it an investment to you too? or do you just want a conversation? random hook up? friendship? thanks?

and should i decline next time i accept a drink in a bar? im not trying to take you home.