Charities and Congregations Are Ready and Willing. We asked respondents how many additional volunteers their organization could absorb and utilize effectively, given their present capacity to manage or work with volunteers and given unlimited availability of volunteers. Fully 91 percent of charities and 96 percent of congregational social service outreach programs said they could currently take on at least some additional volunteers at present capacity. Demand for Volunteers among Charities Is High. The typical (median) charity that uses volunteers reports that it could currently take on an additional 20 volunteers. If this estimate is accurate, it indicates that the number of volunteers has not begun to approach the demands and capacities of charities and.