National Labor Relations Board v. 24 Hour Fitness USA, Inc.

Whether arbitration agreements with individual employees that bar them from pursuing work-related claims on a collective or class basis in any forum are prohibited as an unfair labor practice under 29 U.S.C. § 158(a)(1), because they limit the employees' right under the National Labor Relations Act to engage in "concerted activities" in pursuit of their "mutual aid or protection," 29 U.S.C. § 157, and are therefore unenforceable under the saving clause of the Federal Arbitration Act, 9 U.S.C. § 2.