Nothing to do with serving food (I remember The Cabal Club in London decades ago gave a spoonful of potato salad and a lettuce leaf to get around the law) but here, the 'bars' open have to have restaurant licences to open at the moment..
They are not obliged to serve food with drinks.
If no restaurant licence along with their alcohol, cigarette licences -- they are closed.

Presumably, D.J. has obtained a restaurant licence.

This morning, news that some committees reporting to CCSA are pushing for earlier re-opening than mid- January.