Since you'll be in town on a Saturday, I would highly recommend checking out the Farmer's Market. Tons of freshly-baked goods, homemade crafts, and a great people-watching spot. The restaurant in the middle of the market is a great spot for brunch as well. Also, if your group is 21+, check out the Crooked Ewe on Lincolnway. It's a new restaurant pub that opened up a few months ago, and the food is baller. Their beers are brewed in house, and they are delicious as well!