189. This subdivision applies to contracts of service involving sequential performance, except contracts made by a merchant operating a physical fitness studio, the object of which is(a) to obtain instruction, training or assistance for the purpose of developing, maintaining or improving the health, appearance, skills, qualities, knowledge or the intellectual, physical or moral faculties of a person,
(b) to assist a person in establishing, maintaining or developing personal or social relations, or
(c) to grant a person the right to use goods to attain any of the purposes provided for in paragraph a or b.