You'd be puking a lot more than once or twice if it was food poisoning. Hydrating yourself never hurts, either.
I've had a pretty bad cold all weekend, and honestly this is the sickest I've been in years (as in I haven't been sick in years). Drank both nights this weekend anyway pretty hard, so I didn't let it hold me back. Honestly I don't think the drinking hurt that much as I was going until 6am sat night, and woke up sunday feeling much better than I was on saturday