"A little bit," Percy said. In truth, it was noticable a lot. The cloud of alcohol fumes was very nearly a tangible thing, and Percy wondered if it was possible to become inebriated from the smell along. "Moonshine?" he guessed, filling in the blank that he thought was there. Either that or Draco was going to go rambling on about werewolves. "How is that exactly?" It seemed an odd way to keep vampires away. Percy had always thought it was garlic.
"Well first you stop drinking. And from what I understand, you have to wait for the inebriation to fade." He watched Draco's fingers, which really didn't come anywhere close to him. "You'll likely be fine by morning, although you might have a hangover."