ORCHARDS — A rotating corps of volunteers puts dinner on the table at Share Orchards, a residential shelter primarily for homeless families, each night. It’s no small feat of coordination and resourcefulness to plan, scrounge for, then prepare that meal, said Tina Mann, a case manager at the facility. Even more so, considering there’s no telling how many they’ll have to feed. “It could be anywhere from five to 50, so it’s a huge, huge block of ‘We don’t know,’ at any given day,” she said. Share Orchards is designed, primarily, for families, with some space for single women, Mann said.