This chapter shall not apply to:
(1) Any nonprofit organization;
(2) Any person operating a business primarily for the purpose of teaching a form of self-defense or dance as an art;
(3) Any private club owned and operated by its members;
(4) Any medically related service performed by a doctor legally authorized to practice medicine or osteopathy in the State, in a private office, clinic, or hospital;
(5) The State or any of its political subdivisions;
(6) Any health club which began offering health club contracts or any other contracts in the State prior to December 31, 1969; or
(7) Any club whose function as a health club is only incidental to its overall function and purpose, and whose covered floor space devoted to the maintenance or development of physical fitness or well-being through physical exercise comprises less than thirty-five per cent of the total covered floor space of the club available to members.