"At least we know you're regular," Levi deadpanned right back, because Erwin was plenty vocal about his preference for coffee over tea. They were both a little addicted at this point though, more so probably because both of those things were readily accessible for once.
He was still impressed with the magic, although there was something about it that felt a bit like cheating to him, to just be able to have things appear. Still, tea on demand was never a bad thing.
Chivalry in this regard was easy stuff even if they'd never had time for that kind of etiquette before. Levi twitched a small smile before moving to sit in the chair Erwin pulled out. Completely useless, but nice all the same. "Thanks," he said, not quite awkward, and then moved to pour the tea for the both of them. "How much have you explored the hotel?"