Dublin is the capital of Ireland.
World War II
In 1943, Johann Schmidt and his HYDRA division went rogue, separating themselves from the Nazi regime and intended to nuke the capitals of all countries that would resist his conquest, including Dublin.
Phil Coulson and his team spent a night in a hotel in Dublin after succesfully retrieving an Asgardian weapon, the Berserker Staff, and defeating the group of Norse Paganists that tried to obtain its power.
Skye enjoyed the comforts of spending the night in a hotel, but Grant Ward explained her that those kind of free nights were not standard, although in her opinion, the whole team deserved a nice night, especially Ward. Ward confessed he was not feeling great, and apologized for his behaviour while under the influence of the Berserker Staff, something that Skye didn't even tak into account. Ward confessed the memory unlocked by the staff was about his brother, and Skye offered him the chance to talk to her if he ever needed it. However, Ward told her he was exhausted and he left the bar.
As later revealed to Skye, Ward's true motivations for leaving were the feelings he was starting to have for her, and he needed to keep his emotions in check didn't want to take risks with Skye.
In the room floor of the hotel, just as Ward was about to enter his room, Melinda May appeared at the door of her room with a bottle. Looking at Ward, May entered her room but left the door open, and Ward soon followed her, staying for the night.
The following morning, May received a notice of a new mission, and Ward suggested to follow a plan to take separate routes back to the Bus, so that none could suspect they spent the night together. However, while he was speaking, May simply left.