Plans to create a rooftop beer garden at Glam Nightclub, on Greyfriars Road, have been refused by councillors.
The nightclub sought to extend its licence to sell alcohol so that punters could drink at the club’s rooftop smoking area.
But councillors refused the application, supporting concerns over noise pollution.
The decision was made at by Cardiff councillors at the licensing sub-committee.
Peter Cro, director of Glam Nightclub, said extending the club’s licensing application would discourage people from consuming alcohol quickly to get to the smoking area.
He said: “People don’t want to leave their drinks unattended.”
Councillors heard objections from pollution control and from the Park Plaza hotel.
Rhys Morgan, environmental health officer for pollution control, opposed the application, saying an extension on the licence would cause a public nuisance.
Stephen Docking, night manager at the Park Plaza hotel, said: “We are as keen as possible to reduce any further prospective noise on Greyfriars Road.”