Fun fact: The odd man out of the 26 games to date in North America that got the Kryptonite ESRB rating of AO, got that rating for gambling. "Peak Entertainment Casinos" Due to the ability to gamble using real currency like a brick and mortar casino. All the other AO games got that rating due to graphic sexual imagery and/or violence.
I remember grinding the FF14 main quests until I've unlocked the casino; because I wanted to play Mahjong there. But once I was there, it didn't find enough players for a match and I haven't played FF14 ever since