River House, a homeless shelter in Beverly, is seeking volunteers to donate prepared dinners to the shelter’s guests. People are asked to prepare dinner for 30. Food may be cooked at River House or at a volunteer’s home. Wine or other alcohol should not be used in the meals. River House, which reopened in the fall, operates on public and private donations. Those interested in providing meals for 30 should call Anne Strong at 617-721-0872.