or use membership passes in the opposing club? For example: If Fitness Club Alpha allowed members from Fitness Club Beta to use its spas and Fitness Club Beta allowed members from Fitness Club Alpha to use its training facilities, with both fitness clubs promoting the exchange of services to their respective members, then isn't that collusion? Collusion is an agreement between two or more persons, sometimes illegal and therefore secretive, to limit open competition by deceiving, misleading, or defrauding others of their legal rights, or to obtain an objective forbidden by law typically by defrauding or gaining an unfair advantage.[citation needed] It is an agreement among firms to divide the market, set prices, or limit production.[1] It can involve "wage fixing, kickbacks, or misrepresenting the independence of the relationship between the colluding parties".[2] In legal terms, all acts effected by collusion are considered void.[3]