Duffer's is an old favorite for those who have been visiting WW a long time. They have an old-fashioned themed restaurant, an arcade and mini golf.
The mini golf was nicely done, fun, and well-taken care of.
The arcade is good enough and a nice way to spend some time if the weather isn't good or if you want to get out of the summer sun a bit.
The restaurant has decent food and the price is ok. I think most people go more for the interesting atmosphere. There's a little train that runs on a track near the ceiling, a piano plays itself, there's a little store with trinkets... I think they're probably most famous for their ice cream. The sizes are a bit insane - I think a "small" cone has a half-gallon of ice cream on it. And it's expensive. Good ice cream but they really, really need to offer a true "kids' size" for those who don't want THAT much ice cream and who don't want to pay so much for a serving. At the amount and price they offer, it's more ridiculous than anything.