Suspended Perth councillor Reece Harley has rejected claims he hosted his buck's night for free in the City's controversial dining room and accused council rivals of muckraking.

A grainy photo of the 2015 dinner, which shows 11 men including Mr Harley at a table in the Council House dining room, had been distributed within City of Perth circles along with the allegation, but Mr Harley said the function was instead for "inspiring young professionals".

Reece Harley said said the function was a meeting of "inspiring young professionals".

Mr Harley said he hosted a separate buck's night at the Old Faithful Grill on King Street.

Councillors were allocated $12,000 a year of ratepayers’ money to spend in the dining room before the council was suspended for dysfunction last year.