If someone watched them, he might as well also think they were normal drinking buddies, as long as he hadn't seen their earlier one-sided scrap or heard any of their harsh words. One was buying the other a drink, nothing Oli would expect from normal rivals. Enemie wasn't the right word for it.
"You know I can't say no to that." Oliver had been the weaker drinker of them both, maybe because of Marcus bigger frame and his stronge build, or because he had more practice? merlin knew what those Slytherin spent their free time with. Oliver didn't wnat to know...
Though in Flint's case he'd make an exception. And because of that he did something he'd never done before. "So, where are you living now?" he found himself asking. He'd never asked Flint anything really personal.