OLA Volunteer Opportunity at The Samaritan Inn. The Samaritan Inn is a comprehensive homeless program that helps willing people gain dignity and independence. There are 20 volunteer spots for ages 14 and up. One adult volunteer is required for every 4 teens. The location is 1710 N. McDonald Street, McKinney. Contact Robin at 817-690-3687 for more info or register to volunteer on our website on the "Register Online" tab.