Ron would have mocked Malfoy for the awkwardness if he wasn't feeling it too. His first instinct was always to insult the other man, but that wouldn't work now that he and Harry were dating or whatever. At least, not without Malfoy making the first step in that direction. Ron was a mature adult, and sadly he needed to act like it.
"I guess. It's a party anyway. Music, food. The cake's a high point." Ron was looking forward to that later. "And you can't go wrong with firewhiskey." He eyed Draco, smirked a little. "Well, juice for you, right?" Maybe a little mocking wasn't out of place. It would certainly feel more natural than whatever this was. "I guess we shouldn't be surprised with a Wierd Sister in the castle. It'd be more weird if he hadn't found music."