Oliver arrived at Draco's club, wearing his Muggle clothes, not just because he loved them, but because he hoped it would piss Malfoy off.
Although, given how lax he had been in his potions brewing lately, he seriously hoped he wouldn't have a run-in with Severus. The weather was just too nice out to be cooped up in a dungeon all day or night brewing. Oliver Wood is a flyer, and he belongs in the air.
Wood disappeared in the crowd. Well, disappeared as much as a Quidditch star could disappear.