Marcus and Roger
There were plenty of thing that Marcus still didn't understand, but knowing that Roger could and would explain those made his own ignorance a little more bearable. He had thrown on one of Roger's button down shirts to cover the scars on his bicep, but he still felt rather exposed in Muggle clothing. It wasn't uncomfortable, per se, just a little strange, and there were plenty of people in the crowd around them showing even more skin, so he didn't feel spectacularly out of place.
"Go right ahead," he answered as they walked. "I don't drink, so I can get us home without worrying about you Splinching yourself." While he would have a beer or two on occasion, Marcus almost never drank alcohol in concentrated doses - there were too many bad memories tied up in the sensation for him to enjoy being drunk. "Why is there so much glitter everywhere?" he asked as an afterthought, when yet another shimmer caught his attention out of the corner of his eye.