The location of the retail or service establishment, whether in an
industrial plant, an office building, a railroad depot, or a government
park, etc., will make no difference in the application of the exemption
and such an establishment will be exempt if it meets the tests of the
exemption. Generally, however, an establishment, wherever located, will
not be considered a retail or service establishment within the meaning
of the Act, if it is not ordinarily available to the general consuming
public. An establishment, however, does not have to be actually
frequented by the general public in the sense that the public must
actually visit it and make purchases of goods or services on the
premises in order to be considered as available and open to the general
public. A refrigerator repair service shop, for example, is available
and open to the general public even if it receives all its orders on the
telephone and performs all of its repair services on the premises of its
customers.