Yeah, admittedly I tend to keep some sort of food on hand to snack on while gaming, as well something to drink to keep me from getting thirsty. Especially since when focusing on a game you may lose track of time, thus not getting up to get a drink or eat.
Some of the most fun you can ever have is playing games with friends whilst getting responsibly intoxicated. Provided someone is willing to cook and provide healthy food, it is an opportunity for an inexpensive night of fun.
I would fall into the category of eating before or after, although I don't mind a bit of water nearby.