The area around the hotel remained cordoned off on Wednesday with a heavy police presence. Several lorry loads of steel barriers and fencing arrived earlier in the day as the Garda operation continued.
At night, hundreds of people came to the location at different intervals, many of them onlookers and some with young children.
Fireworks were let off and stones, bottles and masonry were thrown at Garda security cordons.
Two officers were taken to hospital with injuries – one after being struck by a bottle, the other with a shoulder injury, said An Garda Síochána (Irish police).
The police maintained control throughout the evening, with a large number of officers on the ground.
As the evening went on, the relatively small gathering dwindled and, at another cordon, a small crowd that had gathered eventually left the scene.
The 23 arrests on Wednesday were primarily for public order offences.
In a statement, the police said officers on cordons “were subject to ongoing verbal abuse and subject to missiles (bottles, masonry) being thrown and fireworks discharged”.
It said the disorder was “predominantly carried out by young adult males and teenagers”.
Earlier, Garda Ch Supt Michael McNulty, the scene commander, said the disorder had been orchestrated by “disparate groups on social media, who stir up hatred and violence”.
