PantiBar, one of the country's best-known gay venues, has donated €750 to a cancer charity after pleading guilty to breaking the smoking ban.
The bar - which is run by drag performer Rory O'Neill AKA Panti Bliss - was prosecuted by the HSE following an inspection by an environmental health officer.
Taoiseach Enda Kenny famously went to a Fine Gael party in the bar on Dublin's Capel Street before Christmas.
The company, Pantibar Ltd, pleaded guilty at Dublin District Court yesterday to breaking smoking-ban regulations and having a cigarette-vending machine on the premises while not being registered to sell tobacco products.
Environmental health officer Claire Wilde told Judge John O'Neill she went to the bar on October 23 last year.
There were a number of people using the smoking area, which was indoors, the court heard.
The court heard that 'No smoking' signs have been erected, the bar is now registered to sell tobacco, and renovation work is being carried out at the smoking area.
Counsel defending said the venue was a gay bar and smokers had to go out onto the street, but they were "getting interference from passers by".