Jack had been moving from bar to bar, enjoying their selections of rum and having a good time with song. He'd been present since before Booth or Owen had arrived, swaying back and forth a few seats down and having a nice chat with the gut to his right...until said guy wobbled off, saluting the captain.
"Aye, aye and a fine night to you good sir! May you serve the sea well!" It made sense to Jack, having yelled his parting to the bar friend. He spun on his stool, catching himself on the bar top to keep from falling off, and returned to his drink, trying to get through another song about 'really bad eggs.'