Hyndburn's Labour group have said they would re-open the town centre toilets on Peel Street.
The toilets have been shut on Mondays, Wednesdays and Sundays by the council, with people directed to the nearby market hall.
But a Facebook site, set up to campaign against the closure, attracted more than 165 members and protesters placed two potties outside the toilets to vent their anger.
Tory council chiefs claim they saved £10,000 from the move, but also indicated that the main reason for the decision was to boost trade.
At the full council meeting they accused the main opposition group of trying to score political points from the issue, after their alternative budget contained a promise to reinstate the facility.
But Labour Coun Tim O’Kane said toilets were regarded as a front line service by the public, and claimed the market hall facilities discriminated against youngsters because they are located on the balcony.
He said: "Anyone under the age of 14 cannot go up there on their own. It’s not very convenient for them."
And his Rishton colleague, Coun Harry Grayson, added that Rishton had not had a public toilet for 15 years.
But markets chief Coun Marlene Haworth said: "I find it amazing that they’re still bleating on about Peel Street toilets."
And Community cohesion spokesman Coun Tony Dobson added: "The main reason was to drive custom into the market hall and to use those facilities that we have refurbished and spent a lot of money on.
"They are very central and that drives custom from the market hall. I don’t know what’s wrong with that. We have saved money by closing the Peel Street toilets. That’s good efficiency, using the resources we have got and saving £10,000 at the same time."