Sit and talk. With a demon. Definitely a bad joke.
Castiel had been treading the line between creative reinterpretation of orders and outright disobedience for a while, but this was less 'straying over' and more taking a flying leap off the parapets. Except that angels didn't really 'leap' so much as... well. That word. The F-word. The one Cas was trying very hard not to think about, especially with seals breaking and Lucifer...
Make that two things he was trying hard not to think about.
Three, if you counted the fact that he'd left his charge in an entirely different country so he could go out and sin. Granted, Dean had the protection of the wards (assuming he stayed within the complex) and could recall him with a thought... but still. 'Dereliction of duty' might only have been one more charge on a long list of many – the ones Cas could think of were numerous enough, and he had no doubt Zachariah would find other faults - but it was one of the ones which cut deepest.
Okay, so amongst the many things Castiel was trying not to think about...
Drunkenness was looking more appealing by the minute.
For someone trying hard not to think he probably presented as someone concentrating very hard, his brow furrowed slightly as he looked around, following Ruby's lead given that she seemed to know where she was going while he definitely did not; when the eyes of Heaven had strayed to Ireland it was generally not because of their tourist attractions or alcohol, and Cas' own attention had been... elsewhere. So he thought, at least. It was becoming harder to remember the specifics of Heaven, which ought to have worried him, but at the moment it just felt like one more item in the 'do not think about' column. Regardless, the city did not feel particularly unique as human civilisation went; were he less impartial an observer, he might have noticed a myriad of differences, the specific atmosphere a local might cherish or a wanderer feel alien within.
The texture of cobbled streets was a novelty, though, as was the look on the barman's face as the angel delivered the less-than-immortal words “I would like to purchase some alcohol.” in his usual deadpan, which inspired another confused headtilt – wasn't that the reason people went into bars? Why, then, was this man – who, one presumed, spent most of his time in such a place – surprised?