The union representing New Jersey performers at Medieval Times has filed two unfair labor practice charges against the dinner entertainment chain, after the company sued it over alleged trademark infringement earlier this month. 

Medieval Times, which operates a performance venue in Lyndhurst and nine other locations in the U.S. and Canada, filed a lawsuit in federal court on Oct. 13. It alleges the newly formed union co-opted the company’s branding when promoting its organizing efforts — using “Medieval Times” in the union’s name, and using castle imagery and colors similar to those used by the company.

Labor experts say the lawsuit is a unique approach to discouraging additional organizing efforts across Medieval Times’ other castle locations and bog the union down in legal fees — but say it’s unlikely to win in court.