R.I. Gen. Laws § 16-38-4: Exclusive clubs.

No society, secret or otherwise, no fraternity or sorority, and no club to membership in which less than the entire student body shall be eligible shall be formed in any public school or among the pupils of the public schools; provided, that this section shall not apply to class or school organizations formed and conducted exclusively for the purposes of promoting approved school activities, and subject to supervision and direction by teachers under rules and regulations prescribed by school committees.