The women are suing the club in federal court, claiming they were cheated out of tips and wages.
A federal judge ruled Wednesday that the suit can proceed as a class action, meaning any dancer who worked at Penthouse in the last three years can join it.
"It's a huge victory for the workers here," said lawyer Justin M. Swartz, of Outten & Golden, which filed the suit on behalf of the dancers.
"They filed this case for their co-workers to recover their lost wages."
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In her ruling, Federal District Judge Naomi Reice Buchwald ruled some of Penthouse's arguments against putting the suit into class action status "borders on specious."