Two players grab hands and form the "house." Another person gets in the middle and becomes the tenant. You need at least one person to not be in a house or be a tenant. When everyone is set, the player that is not in a house or is a tenant yells out "house," "tenant," or "earthquake." For "house" all players that form a house must leave their tenant and find a new tenant. For "tenant" all tenants must leave and find a new "house." For "earthquake" everyone breaks apart and forms new "houses" with new "tenants."
A good game for large groups.