Having already been reaching for her purse when John moved to pay, Hermione was only more sure that she'd been wrong about everything before. She'd never had to not pay for her own drinks. This little interrogation was looking more and more appealing.
Taking a sip of her drink, she leaned to look around John at Jack, "Potions? Are you good? Do you work with already existing ones or make you're own? I've always been sort of alright at potions, but not enough to be considered good. Or brave enough to actually experiment with them," she leaned closer with real interest in her new drinking partners. "As for what I do do, I work in the," she took a deep breath and spouted quickly off, "Department for Regulation and Control of Magical Creatures. I'm pretty much an organizer with an impossibly long title."