The dining halls at Williams College seem to be open to everybody. There are three dining halls: Driscoll, Whitmans (Paresky), and Mission. Follow the link for menus and hours. All except Whitmans are all-you-can-eat buffets. These cost $12 for dinner and $7 for lunch. At Whitmans you can buy different courses separately, but the most expensive will only be $12 as well. At night, there is a snackbar in Paresky, and every night except Sunday and Monday there is pizza in the basement for $7 (really good).