Underground Parlor Games?

[Molly Sailswain]

Someone invited me to join them in a parlor game (much like the PvP invite), and it took me to a room that reminded me of where Will Turner gave us a sword at the very beginning of the game. You had to go down a few steps, and there was a table for poker and a table for blackjack. I asked the guy who brought me there how he knew about it; he said he didn't know.

When I left out the front door, I ended up in Padres del Fuego, but I couldn't find a door back inside.

Anyone know the scoop about how to access this again?