Hotel City: Level up in Pirates Ahoy to unlock tavern and Cold North locale

Playfish/EA's newest Facebook title, Pirates Ahoy, landed on Facebook shores in early July. For the last two months, it's clear that the game has proven fun, but hasn't truly stuck with players. But last week, membership in the game skyrocketed by 3 million monthly average users, and 137k daily average users.

Such a change can be attributed to the fact that -- a week before the increase -- Playfish released "The Cold North" cross-promotion between Pirates Ahoy and Hotel City. So the promotion is clearly working. Now let's see what's so popular...