A mechanism for utilization of virtual machines by a community cloud is disclosed. A method of the invention includes authenticating a virtual machine (VM) to be joined to a cloud environment managed by a central administrative computing device as a cloud computing resource, wherein the VM is operating on a workstation that is not a dedicated cloud computing resource, updating a database of VMs utilized as cloud computing resources with information of the VM related to its operational status, and providing instructions for the VM to operate as a cloud computing resource, the instructions based on current demand for cloud services of the cloud environment and an overall current supply of cloud computing resources presently available in the cloud environment.