In my opinion, that transmission is amplified with ductless products. It's essentially a recirc unit with a coil. Would like to know if they had outdoor air for dilution introduced in the ductless unit. Perhaps they have OA connected and thus only a few infections.
In US, code requires outdoor air in commercial buildings. We also tend to use central HVAC rather than ductless units. Should aid in dispersion/dilution in US. However, many restaurant/bar systems are so grossly oversized that outdoor air economizers are taken to zero percent because of comfort issues.
Still not ideal to be in a room with a bunch of loud talking and such.