Bad food
There's a wide range of this, ranging from greasy spoon diners to the poorly prepared, over priced with ambiance that will demand your firstborn child as payment.
And there's some places inbetween that are just fine, and to the locals, some of these places are classic.
If you want to visit a local hangout, try:
good food
This can be harder to come by. The quality of food is rising in Geneva, but can still often be disappointing from a Continental or Big-City point of view.
For a consistently good meals, try the Madderlake Cafe. The cafe looks humble, but is run by a couple who came east from the wine growing regions of California, where standards and competition are stiffer. The wine there is excellent, as one of the couple is a sommelier the other is the chef. The food is higher quality than many of the 'fancier' restaurants around.
pizza
This could also be listed under the "Good Food" heading. Geneva has some excellent pizza joints.
People will argue over the virtues of Cam's thin crust vs. Mark's thick crust. In my opinion, they're both delicious.
Uncle Joe's is also good, and does a terrific lunch special for about the price of a gallon of gas. They make their cookies in house. If you don't get any pizza while you're in Geneva....well, you've wasted a trip, haven't you?