He was frustrated beyond belief. His anger hadn't yet subsided and he hadn't helped his friends nearly as much as he should have (or so he'd led himself to believe). Ameiko had shunned him as he came to her rescue. He very nearly became in need of rescue himself, and to top it all off, he still felt sickly from the mystical serpent's poison running through his veins, poisoning him still. Though his body would eventually overcome the effects, it helped remind him of what he considered his overall failure at this point.
He couldn't face the others in this mindset. He needed to cool off and back away, however temporarily. So he decided for a stiff drink before reconvening with the others.
And if a bar brawl came of it, then so much the better.
On his way to the Hagfish, however, he heard screams. Female ones.