'"I am a Malfoy, and Malfoys do not get drunk. We enjoy alternatives to sobriety."'
(Gentle reminder, dearest nerdlets, that getting drunk is not the smartest thing ever, and is best avoided.)
OK, so Draco's stinking drunk after a good/bad night out, depending on your interpretation, and Ron and Harry end up making sure that he gets home safe.
Because Ron and Harry are clearly good friends/colleagues (on account of they're all growed up now and have jobs.)
Also Harry maybe has a thing for a certain blonde Slytherin.
(But, you'll be happy to know, he acts the perfect gentleman.)