Hermione was still sitting up, despite her drinking, though it probably wouldn't be too long before she leaned back. Hermione was tiny on the alcohol level, seeing as she stood at about 5 and a half feet tall. Add her somewhat small frame and there was an equation for 'easily susceptible to alcohol'. But she wasn't quite there yet.
She was about to remark on how Ron was staring, and that it was rude, when he spoke. "I drink outside of holidays. Just not too much. Maybe when I go out to dinner with someone, or sometimes I drink home."
Hermione's brow furrowed slightly at the mention of Lavender. It wasn't that she disliked Lavender, necessarily, but the two had fallen out since she'd had that dating stint with Ron back in 6th year. The whole thing had been a huge hit to Hermione, and she'd gone through a bit of a rough patch because of it. "Oh." She replied, her voice becoming slightly soft. "I know Parvati's here, though, but not many other people. I didn't see Lavender."