Pepperoni's, in the Springs section of the New York resort, East Hampton, is a casual, down home place, best for takeout, where you can pick up a number of gluten-free items.
Besides several varieties of pizza, there are ravioli, penne and stuffed shells to try. For your non-gluten-free pals, the Grandma's Pizza, with its spicy tomato sauce and the meatball parmigiano hero come highly recommended. Since it's a bit of a distance from the main area of East Hampton, it's a good resource to have in mind if you're not in the mood to drive into town.
The staff is friendly and the Tate's gluten free chocolate chip cookies out-of-this-world-delicious (but not made in a wheat-free facility, if you avoid those products).
The pizza, however, left a bit to be desired. The onions were raw, the olives appeared to be canned, and the mushrooms rubbery. The sauce was fine, the cheese just adequate, though there seemed too much cheese for the amount of sauce. The crust was underdone and not oiled (enough, if it was at all). It always amazes me how diverse the results can be when beginning with a standard gluten-free frozen pizza crust.
They can range from edible, here, to extraordinary, at Bistango, to somewhere in between at Villa Italia (in East Hampton, but in town opposite the train station) and at L'Asso (in NYC's Little Italy, where you'd expect the best, but wouldn't find it). If you happen to have a gluten-free frozen crust pizza you're not enjoying (Still Riding is the brand used by most places), please don't give up on the concept because the execution is less than excellent--they can be delicious. Just shop around!