That's scary as hell, and scarier knowing that quite a few bodies have never been recovered.

Took a cruise on a Carnival ship a year or two back. While everyone else was at the casino or one of the dance clubs, my hobby was to wander the public areas of the ship. On the plus side, egress from the lower decks is pretty straightforward because the layouts are pretty simple, like you see here - long hallways of rooms serviced by two or three main stairwells (and usually a couple of smaller stairwells near the ends).
I think what we may be seeing here is that these guys want to get from one end of the ship to the other, and they're on one of the entertainment decks that are a little more convoluted in layout, so it's simpler to head down to one of the hotel decks and across to the other main staircase.
As I recall, the safety instruction was as cursory as you might expect: "The life jackets are in your closet, now lets all go meet in our designated meeting spots; ok have fun." The assumption was you'd head to your "rally point" and the trained crewmembers would direct you from there, presumably to a nearby lifeboat.

*dead says it does not exist.

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