Although Moyle District Council has a chairman rather than a mayor it does have a Mayor's Parlour. Occasionally the chairman is mistakenly referred to as the mayor, even by the office holder. I understand some councillors retire to the Mayor's Parlour for a 'snifter' after the conclusion of formal council business ie to wet their whistles.
I'm told that members of a political party assembled in the Mayor's Parlour recently, presumably for some sort of social gathering even though such facilities, presumably, are not designated for party political purposes. Perhaps councillors and/or officials can provide some clarification.